When ZeroTouch is laid flat on a table it can be used as a drawing board, mounted on a computer screen it can be used as touchscreen device (cheaply converting any regular computer), and if hung in the air it can be used as a virtual canvas for painting. Another difference between ZeroTouch and other types of touch screen is that it requires no pressure and according to its creator Jonathan Moeller it tracks 20+ fingers in its current configuration. This makes possible the use of gestures such as pinching and spreading. The team is also working on a three-dimensional device that should allow for hovering and 3-D hand manipulation of virtual objects. 

via PhysOrg