This has already been talked about millions of times. If they removed Kinect they could unlock the Hidden 10% Super Secret Sauce Power blah blah blah. So the $399 kinectless Xbone could be more powerful than the $499 Xbone with Kinect?
No, I doubt it. But they may disable Kinect for some games that want that 10%. That's the most likely thing from the sound of it... they could allow developers to disable Kinect so Microsoft didn't look like the bad guys when people realized they wouldn't be able to say "Record That" etc.. This is all just conjecture, though... who knows what will happen at this point?