What looks kinda creepy actually sounds quite cool. The Concert Hands system teaches you piano (or keyboard) using a 10-finger feedback system that gently pulses when you should play, coupled with an automated wrist pilot that guides you across octaves.
The idea being that repetition builds muscle memory, and you'll improve faster.
You'll need to email for pricing, but it does look like the included software works with any MIDI file. Less certain is if there's an evil teacher mode that turns up the voltage when you misbehave. [Concert Hands via The Raw Feed via DVICE]