Microsoft's Skinput turns hands, arms into buttons

tlanta, 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."