Four robots performing a quasi-traditional Japanese fan dance and something of an N'Synch routine. These aren't the robots of the 60's.
Well, I'm not trading in my Roomba for them, but this is still pretty cool. It's both in degrees of motion, and the way they can shift weight (or appear to shift weight) from one leg to the other that really gives them an interesting look.
How much, and can I buy them for Xmas presents yet?