Intriguing concept! One step closer to having a micro-computer in your pocket that does everything you need it to.

Ce projet, j'en ai un peu rêvé. Il me le faut! I need this!!!!

Doesn't seem user-friendly to me. The instant you get your hands near it, a large shadow of your hand is casted on the surface.

"Doesn't seem user-friendly to me. The instant you get your hands near it, a large shadow of your hand is casted on the surface. "
Then you are spoiled rotten. The purpose of having the projector in the lamp is so it is out of the way, to avoid this shadow problem as much as possible. Besides, you will still see the projection on your hand. No projection or touch display is without its problems.
If you are in a position to do better, then please go work for or acquire controlling stake in one of the many companies still producing resistive touch displays, and force them migrate to capacitive touch. Do it with an iron fist on bullet-proof plexi-glass if you have to; then you can sneer all you want at anyone else who still uses resistive touch.

dont particularly care for capacitive touch myself. Since I'm not in kindergarten and dont need to finger paint. Give me a stylus, I'm an adult.

plus I bet it heats up a lot.

Contrived video of a rube goldberg solution looking for a nonexistent problem. Which of course means it's probably the next big thing.

Minority Report anyone?

Better to project a simple 1.5-octave piano keyboard from in front of the hands and thereby need only linear/binary tracking of keypresses. "Polyphonic" macro capabilities would enable 6-10 times the speed of input compared to querty. I made the software available for $5, beginning in 2001 for midi-to-pc setups, but it will work with anything, redirecting midi codes to the keyboard listener. It's called Stormkey.

On the upside, it's probably way more responsive to typing than the Surface RT; on the down, no way are you gonna dodge things by one pixel in Touhou games. Handing your project in by putting it into the professor's desk lamp is pretty cool.
Having a bogus keyboard with wonky velocity sounds like pure hate, though; did you have a keyboardist who broke instruments? I mean, The Smiths could consider it, but you know, it's just the MP now who'd go fo that.