They do concepts. That's all there is to it. None of it are real. They make pre-recorded videos and just does the touch gestures on cue.
Hopefully those concepts will give the developers some new ideas that may be possible to implement.
Everything is possible. Impossible just takes longer.
Current Device: Galaxy Note and Nexus 4
HTC Touch HD
HTC Touch Dual SOLD!
HTC TyTN SOLD!
O2 XDA Exec
Nokia 6630, 3660, 6510, 8210 and 3210 Trashed