Saw this too. Very interesting. The person in the video demostrates what it does and what you need to do to play it. The machine plays piano rolls but it involves you working the pedals and other things to make what otherwise would be a boring sound spectacular -- if you know what you're doing.
Looks like it's good for dj's at 2:50. Imagine a seriously fast piece!
Cool machine! (http://www.youtube.com/watch?v=2A6ZXZwl3nA&mode=user&search=).