I definitely do not see this staying in it's current incarnation. Having to set a mobile phone down in order to use it highly inhibits usability. The lack of

I definitely do not see this staying in it's current incarnation. Having to set a mobile phone down in order to use it highly inhibits usability. The lack of tactile feedback might also be a problem. I do, however, see this tech progressing to other devices and maybe migrating to the front of the phone. If the interface is calibrated well, you could very well have a touch phone with 3D gestures (push/pull/grab/rotate/etc) and you wouldn't need to worry about fingerprints on the screen. Iron man's 3D modeling device, anyone?