Well, since day one I've said both Move and Kinect would not be that huge. I said both might barely make the 5 to 10m (10% to 15% of their repsective userbase) mark. However, I did say that Kinect might prove me wrong due to Dance Central.... and it appears that is exactly what is happening.
Dance Central is a really fun game and like Wii Sports propelled $250 Wii's for years at astronomical levels, Dance Central is doing the same for $200 Kinect DC. Hell, this time next year when they can both be had for $200 (assuming X360 and Kinect price drops), 360 will be selling quite well going into the next gen launch year of 2012.
Granted, DC could still wane off due to over saturation of dancing games (thanks to those on Wii) like music games (Guitar Hero and Rock Band are dead) and unless there is some other major pull, like how Wii had Wii Fit, it could taper off quickly.
However, unique Move users will still never be that great of percentage of PS3's userbase.
