Interaction design taken way, way, way too far

I'm not trying to say the folks at the Hasso-Plattner Institute are crazy, but guys: the folks at the Hasso-Plattner Institute are crazy. Introducing the Imaginary Phone - an exercise in how to take interaction design to its (il)logical conclusion. Using a large depth camera mounted on an arm, the system can read your palm - or, rather, read your opposite hand's motions across said palm, as you swipe, tap and gesture as if it were your real phone (which is meanwhile in your pocket or something). Why would you want to play Angry Birds while your phone is still in your pocket? Honestly, your guess is as good as mine. But it could potentially evolve into something greater. I really don't like smearing my greasy fingers all over my phone. Check it!