Heh! That's a funny observation. The thing is: when you play the piano, all the things shown in this demonstration are happening, but they're happening inside your head; so, playing the actual piano is harder because you have to do everything shown in this video _plus_ wiggle your fingers in exactly the right way.

I agree. It's amazing to SEE what's actually happening in the mind of a piano player (dynamics, tempo, phrasing, etc.) Also, I love that you can control all these things, instead of simply having a robotic machine (or recording!)

Simply amazing... I guess this is what you had to do before the invention of phonographs, radios, CDs and MP3s. Great demonstration -- thanks for sharing this.