http://www.youtube.com/watch?v=uxtHnwZ_FGw

Fast-forward a bit to see Chris Pirillo playing the instrument.

[Via http://www.boingboing.net/2007/12/28/electroplankton-inve-1.html which says it costs $1200, a little expensive...]

who is this guy?

and why he has so big screens? http://chris.pirillo.com/live/ oO

NO! The MONOME!!! http://monome.org/ It can do SO MUCH more! and it's open source! http://video.google.com/videosearch?q=monome

Coollll!!!!!!

Does this mean a new generation for music?

Doesn't that looks like a hardware version of fruityloops.
http://www.flstudio.com/

If you haven't tried this software, play around, its fun :)