1) You still have to have the Kinect, and so long as the console is on it, too, will always be on. (And apparently even when the console is off it will still be listening for the "turn on" command. This has implications I'm not comfortable with.)
2) Independent developers will still be prohibited from participating in the Marketplace.
3) It will still be $100 more than the PS4.
I've been a 360 owner for several years now. At this time it doesn't look like I'll be getting the next generation model.