This is the Atari Hotz Box, designed by Jimmy Hotz. If you're thinking he sounds like some crazy '80s dude with terrible hair, who used to hang out with Fleetwood Mac, Chicago, Yes and Kim Basinger, then you're right right right. The Hotz Box was a big box (about the size of a 5 octave keyboard) covered in touch pads which triggered sequences and arpeggios from an Atari computer, or could be played like a normal keyboard. It looks awesome, and the software seems fantastically elaborate. Best of all, it's got a huge Atari logo on the back. I want one! There's a lengthy retro review here.