They will likely have a great show but at this point they need a game-changer to get consumers to favor the XBox One. Kinect is vital to them because that's pretty much the only thing that trumps Sony's hardware (when you compare cameras and support for it). Anything shy of them buying out Sega won't change the perception. Sony has the momentum and they know it.
Good point. With price parity Sony still has more powerful hardware, but MS has kinect. If MS can show it being worthwhile, those two could cancel each other out in terms of perceived value. But can they? They haven't managed very well so far.