It's a Tenori-On!!!

found out what it is! It's a Tenori-On- I want one soooo bad- and they're only $999 right now- CRAZY

From their website- "Media artist Toshio Iwai and Yamaha have collaborated to design a new digital musical instrument for the 21st century, TENORI-ON. A 16x16 matrix of LED switches allows everyone to play music intuitively, creating a "visible music" interface."

Here's Little Boots doing a Hot Chip cover of Ready for the Floor.