The Next Futuristic Cellphone Touchscreen: Your Skin [Video Inside]!!

Atlanta, Georgia (CNN) -- In Chris Harrison's ideal world, mobile phones would be the size of matchbooks. They'd have full-size keyboards. They'd browse the Web. They'd play videos.
And, most importantly, you'd never have to touch them.

Sound like too much to ask? Maybe not.

Harrison, a graduate student at Carnegie Mellon University and a former intern at Microsoft Research, has developed a working prototype of a system called Skinput that does just that, essentially by turning a person's hand and forearm into a keyboard and screen.

"People don't love the iPhone keyboard. They use them. But they don't love them," Harrison said in a interview at the recent Computer-Human Interaction conference. "If you could make the iPhone keyboard as big as an arm -- that would be huge."

Using Skinput, a person could tap their thumb and middle finger together to answer a call; touch their forearm to go to the next track on a music player; or flick the center of their palm to select a menu item.

All of these sign-language-like movements, which are customizable, would control a gadget in a person's pocket through a Bluetooth connection.

When fitted with a pico-projector, the Skinput system could display an image of a digital keyboard on a person's forearm. So, using Skinput, someone could send text messages by tapping his or her arm in certain places -- without pulling the phone out of a pocket or purse.

"You could pretty much do a lot of what you do on your iPhone," said Harrison, who says Skinput "is [like having] your iPhone on your palm."

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