Hacker News Reader

Unless I missed it, the microsoft HoloDesk does not provide tactile feedback like the one in the outube video. Still cool though.

The seamless transfer of sphere from sheet of paper to cup was pretty cool.

How would one do that?

Lasers? Focused blasts of air?

Its explained in one of the video (at 1:00). Basically they use a focused ultrasonic beam to create tactile feedback.