Why does everyone say "If you dont include Kinect you will split the audience" ? It makes no sense, the audience is ALREADY SPLIT by mere fact that the games come out for PS4 as well, PS4 has no Kinect. Yes there are exclusives, but any 100% kinect game is as gimmicky as the WiiU tablet.
My point here is that Kinect even being in every box, most of the time will be as useless as a "Honk" button on Mario Kart WiiU tablet... Do we really expect any one of 3rd party titles that are coming out for both PS4 and X-bOneEighty to have unique features to utilize Kinect that are not simple, hey Billy we have this game coming out, why dont you spend a day coming up with things to tack on for Kinect?
Most of the games are 3rd party games, for them even with Kinect in every box the priority is to make it an amazing experience without Kinect (otherwise they wouldnt be able to sell to those without Kinect) AKA PS4 owners, and as of right now it seems like PS4 will have a larger market share (unless PS4's wheels fall off the bus before November).