The 1080p thing for me is a complete misnomer, the fps is much more important. For instance sunset overdrive is 980p i think, but solid 30fps and its an incredible looking game. The only way you would notice a difference is if you played both side by side and had a top quality tv really. Me, I prefer to look at games for the enjoyment of playing rather than counting a few pixels, its ruining this new generation a bit.
Uno, Kinnect has some more game integration but not a lot, but its a much more advanced bit of kit. Its more integrated in the UI though, loads more speech commands etc. I love that I have it set up so when I walk in it recognises me, turns on the tv and is ready to play the last game I was on with at exactly the same position.