This thing is old news, but the reason I saw fit to make a new post was that it’s finally been completed to a point of public release:
http://synthwire.blogspot.com/2006/10/reactable.html
Somebody tell me I didn’t just spend almost a grand on knobs for nothing 
that’s the jazz mutant lemur innit??
It’s bad, very bad…
But when I saw it you had to use their APIs and objects and it was very expensive…
We need a big touch screen interface for midibox that you don’t need to rob a bank to fund the project (and a hover bike too please).
Nope, this is an open source thing… Uses any flat screen and a standard video camera 
The idea is really good, but since it includes projector it is pretty expensive. Graphics and annimation are very good if you ask me.