(YouTube Link)

Concert Hands is a gadget designed to replace traditional piano instruction by controlling the user's hand and finger movements:

The software takes the song file and converts it to a proprietary file system where the controller box distributes the signal to the wrist pilots and finger sleeves. The finger sleeves are placed on all fingers of both hands and the user’s wrists lay gently on the wrist pilots. When the music begins the wrists pilots guide your hands across the piano to a specific location and the finger sleeves receive a pulse to indicate which key to press. The idea is after a period of time the repetitive motions and signals will develop muscle memory within the end user and enable him or her to play their favorite songs on their own.

Link via DVICE