Well, the E3 demos showed (based on my memory) Dance Central 2 tracking 2 players simultaneously, Kinect Sports 2 doing the same and adding the ability to track motions in a profile stance (golf swings and baseball swings), games being played both while seated and standing (the Fable Journey demo), finger tracking, and object scanning. Add this to what we already know is coming with games like The Gunstringer and Child of Eden and the games announced at TGS and there is definite progress. Whether that is "much" evolution is subjective, though, I guess.
Voice control is nice because it can be dropped into a game that otherwise wouldn't be a good use for Kinect. I'm all for the "Better with Kinect" concept. If the game's use of Kinect is just a gimmick I can just not use it. If it adds something, great.