Animusic has made these fakes befor to tout their 3D visualization software - check out “Pipe Dreams” or “Starship Groove” if you like this kind of thing. Personally I put it slightly above Beyonce fake-singing.
Now, what really IS impressive how Intel and a systems integrator actually produced a machine over 7 years ago to do what Animusic faked, and in only 3 months time. American exceptionalism at work!
http://www.youtube.com/watch?v=Zqhrfdr5uSE
That's still fairly fake. They have the balls flying around, but the balls aren't actually playing anything. All the "instruments" are bits of plastic. It's still a cool bit of engineering, but the original concept was pretty imaginative as well, rendered beautifully with computer graphics.