Here is a 5 minute video of the Tenori-On midi controller in action, being demonstrated by its creator, Mr. Iwai. It's very different.
I actually found his other concepts on the site more interesting.
The piano with it's 'ghostly' projections, while not a practical controller for most, is striking for interactive 'participatory' art. It relates the abstract to the commonplace in a manner which would appeal to many.