Phones in particular go through a lot of new ideas, and some proposals don't always end up working out.

Here's a list of phone concepts that didn't cantor aren't likely to hit the main street number one.

Optical zoom camera phones.

Smartphones are the reason most people don't have digital cameras anymore.

The only exceptions are professional photographers and film makers who need a degree of performance they can get on Lee from a specialized devise.

One of the biggest advantages of traditional cameras is the ability to take clearer pictures from farther away.

Some companies try to bridge this gap by creating phones whose cameras featured an adjustable optical zoom.

The downside was that all the extra lenses made the phone a lot bulkier.

Given a choice between the two, most consumers ended up choosing slimmer, sleeker phones instead of better long distance photography.

Number two early gaming phones games have been on phone since long before the first iPhones appeared.

Still there, quality was lagging far behind that then current mobile gaming platforms That didn't stop a few companies from trying to put out an all in one phone and portable gaming device.

We could go into all the reasons why various attempts weren't successful, but the biggest one was that they couldn't compete with neither phones nor handheld consoles of the same generation.

They also tended to have unimpressive game libraries and manufacturers that didn't have much experience in designing video game hardware.

Number three Integrated Bluetooth headsets Hands free devices are a big help when you're driving and you can see what designers were going for when they introduced phones that came with a detachable Bluetooth headset.

Beer pieces would plug in the back of the phone for storage and charging.

Despite the convenience phones like this never really caught on.

The biggest problem was that the ear piece had to be small enough that it wouldn't make the phone too bulky.

The smaller components lead to a much shorter battery life and inferior audio quality.

Number 43 D displays.

James Cameron's avatar, with its outstanding use of three D, was all the rage in 2009.

It's no surprise that smartphone manufacturers decided they wanted in on the action and rolled out the 1st 3 D phones a few years later.

Such devices let users watch, create and share three D images and videos without the special glasses.

Unfortunately, although some three D phones made all right sales, they never really took off as a concept.

One of the biggest problems was the lack of third party APS that supported the feature.

It also didn't help that many people felt nauseous when looking at three D images on a handheld device number five transparent phones.

Considering that companies have been working on them since 2009 you'd think see through phones would be standard by now.

One problem is that all the batteries and circuitry need to go somewhere, and since you can't put it behind the screen, there aren't many places left.

Another issue is that you have two images layered on top of each other with a transparent screen.

There's the image on the screen, and then whatever's behind it.

Unless you pointed at a blank wall, your eyes are going to have trouble knowing what to focus on.

You can partially solve this problem by cranking up the brightness, but that uses up more power, reducing the battery life number six game pads.

Mobile gaming has come a long way since the early two thousands, so it makes sense that someone would try and make a modern gaming focus smartphone.

The result was a smartphone that featured slide out game controls and integrated shoulder buttons, as well as a full gaming library to choose from.

The biggest problem, though, turned out to be the lack of demand.

Touchscreen controls worked perfectly well for most players and games.

It's also possible to buy Bluetooth and micro USB controllers that let you turn any phone you want into a portable console.

Number seven built in projectors.

If there's one unavoidable limitation of smartphones, it's the screen size tablets and laptops are bigger, but less convenient projectors seemed like an obvious solution.

The first phones with this built in feature rolled out in 2010 but never really took off.

The biggest issue was the difficulty of balancing size, brightness and image quality.

On top of that projector, phones have to compete with better quality plugin projectors and new technologies like phone to TV casting, numbering dual screen phones.

We've all heard about the foldable displays made from soft plastic or new types of flexible glass.

But there were other attempts at multi screen phones in the last decade.

Some of these early models consisted of two screens that folded together like a clam shell.

Others had a main screen that was always facing outward, and a secondary screen that slid out from behind it well.

They succeeded in offering a large display in the smaller package.

There was no hiding the obvious see where the two screens came together.

The hinge also created a weak spot in the phone's architecture that made it vulnerable to additional wear and tear numeral nine tablets.

Six years ago, tablets were expected to do two computers with cell phones.

Did the landlines that didn't happen?

Though it all comes down to convenience versus utility, smartphones are small enough to fit in your pocket.

You can carry them anywhere without having to worry about cases or special pockets in your bag.

A computer isn't as easily portable, but it's better for anything that requires higher performance hardware like graphic designer gaming tablets have neither of these qualities.

They're still handy, for example, as portable credit card readers, but they sure aren't going to replace the PC anytime soon.

number 10 slide out keyboards.

Smartphones have been shedding buttons for years, but that wasn't always the case.

Many older touchscreen smartphones came with a keyboard that could slide out for more comfortable typing.

Most people thought the touch screen made keyboards redundant, though they also made the phone bulkier.

With smartphones trending toward wider screens, thinner frames and fewer moving parts, it's no surprise that keyboards were the first to go.

You can still find them if you know where to look, but right now slide out keyboard are far from the industry standard 11.

The Social Media Phone What do you get if you take a smartphone but remove the ability to use amps?

You get the social media phone.

The devices in question could take pictures and videos, send texts and e mails and connect you to Facebook and Twitter.

And that was pretty much it.

Considering that smartphones can do all this and more, it's no surprise that we don't see it on the storefronts.

The Social Media phone was intended as a smartphone alternative for kids and teenagers.

The lack of features and its steep price tag didn't go over well with anyone, though 12 clicking screens.

Haptic feedback is the fancy word for getting a physical response from an electronic device.

Things like the rumble on a game controller or the little vibrations when you tap on something on your phone.

There was a smartphone, though, that took it a step further.

It didn't just simulate physical feedback it gave it.

The screen contained a complex mechanical system designed to mimic the feel of a keyboard perfectly.

At least that was the idea.

In reality.

When the screen worked, people complained that it didn't feel natural and made it hard to type.

When it didn't, it made the phone practically unusable.

Number 13 news tickers Do you live and breathe the news?

Do you keep a constant finger on the economy's pulse?

If so, you might have used the ticker equipped phones that started popping up in the early 2010.

The ticker would sit beneath the screen and provide constant updates on weather, news events and stock quotes, along with social media updates.

The problem was that the tickers took up space that could have been used for a larger screen.

They were also too small to provide much information.

The concept failed to take off because it didn't offer enough of an advantage over pop up notifications.

It'll be interesting to come back in 10 years and see what did and didn't succeed in the next decade.

Meet you back here for that one.

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