There's already technology to develop that computer, it's a cool idea though but I guess they won't release it anytime soon because frankly - who would pay for that except of some geeks and assholes.
projection keyboards are not a new concept. like the idea and how vibrant the screen looks. since its projecting the image, i wonder what the battery life is like since it needs to power the bulb on top of all the other usual stuff like computing and processing.
they are even thinking of creating flexi-phones where bending the corner is how you select a certain option. its kind of a backwards step from tapping on the part you want. saw this on engadget a few days ago.