Tenori-On

Toshio Iwai's "Tenori-On" is meant to be a musical instrument for non-musicians. When I first saw mention of it on a Something Awful thread, I thought "Ok, yea...". A video demonstration of the Tenori-On here, however, is most impressive. A description can't do it justice, except to say that the device allows one to assemble minimalist-style music with the multiple layers and fugue effects one expects to hear in pieces by Steve Reich and John Adams. I want one.