Normally we aren't big fans of the 'top ____ of ____' type posts but the IEEE Spectrum Automaton Blog has actually found the best of the best from CES. Behold.
This robot represents a revolution in consumer robotics, a robot that not only balances on you but it also gives "a delightful sense of bodily pleasure". While some YouTubers (sp?) are doubtful saying, "I don't know - it doesn't seem to do anything that a bag of spiders couldn't". I believe that the future will show the success of this robot and it's awesome soundtrack. It will be interesting to see if it comes with an API or wireless interface.
More of the best robots of CES can be found here and while you are at the Automaton blog, don't forget to check their Top 20 Robot Videos of 2010.