Keepon Beatbot

What seems like decades ago in internet time a video went viral showing a cute dancing robot essentially composed of two yellow foam balls.  The back story was that it moved to the beat of music, as displayed on the video it was dancing to.  It was also explained that this robot was designed as a research project for kids, yadda, yadda, yadda.

So that was back around August 15th, 2007.  Where's the commercial version of this dancing robot?  It's pretty much the exact thing we need robots for in this world.  It pointlessly entertains us and seemingly can't harm us in any way.  WoWee can make 500 different iterations of the RoboSapian but not one of them can dance to music in an entertaining fashion, yet these two yellow balls make it look fun.  And yet it's still not yet made and affixed to an ipod dock and dancing to the beats in my office.  What is wrong with this world?  If I needed to freeze myself and rethaw in the future, how many years forward should I set the clock to ensure that there's a good dancing robot of some sort for my entertainment?  Please use the comment section to assist me in making my decision.