Apparently motion control sells well, just not to people who use this website. I'd never dream of getting one, but according to an article on the BBC site, the Kinect has been certified by the Guinness Book of World Records as the fastest selling electronics device ever. It sold faster than the iPad or anything else. The article also says that they've sold 10 million games.
Gaz Davies, editor of Guinness World Records 2011 Gamer's Edition, said: "We can confirm that no other consumer electronics device sold faster within a 60-day time span, an incredible achievement considering the strength of the sector."
Guinness World Records said that Microsoft sold eight million devices between 4 November last year and 3 January at an average rate of 133,333 a day.
I really thought the Kinect was a bad idea (for gaming). There are some neat things going on with hacked Kinects, but the idea of "controller-less" gaming just seems too imprecise and silly to me. But apparently there are kids out there begging their parents for a Kinect so they can play the sports game or the animal game or whatever.
Edit with link to article: