Outside of Kinect Sports and Dance Central, which should both sell upwards of a million by the end of 2010 (Kinect Sports could be at 2 million), theres also Kinectimals, which should pass 500k by the end of the year. Its one of those games that'll easily pass a million mark by next fall. Even games like Your Shape and Joy Ride could reach upwards of 700k . I think the key with kinect software is gonna be legs, and the sales charts are showing it (mixed with the holiday boost).
As far as future games, there arent many, but thats mainly b/c we have no idea whats really coming out in the 2nd half of 2011. The only early games I can think of that could sell really well would be the Michael Jackson Experience game (seeing as how popular Dance Central is) and the UFC Trainer game (supposed to be out in April or May 2011).
I think we'll be seeing alot of kinect support and games announced at next years E3. I wonder if MS could possibly sell 10 million Kinect Units by next years E3.
Essay Pro