Multi-touch interface, video demonstration (click to watch)
Microsoft’s Podtech Research Lab has also been experimenting with a different type of interface based around shape/motion tracking. It works with two hands as well, but without any tactile feedback for the user to ‘press against’. To be honest it looks like it would be very odd to use, as Jeff Han mentions, 3d manipulation of objects without tactile feedback is actually less intuitive and a step away from 2d multi-touch interfaces.
