Kinect is dead weight. I'm sure that MS has been looking into ways to showcase Kinect as a "must have" item for years now. I'm sure they've had devs do the same. Unfortunately for MS, Kinect just does not have any "must have" capacity. It added too much cost into the unit where other parts, the more important parts, could have seen that overhead go into. It really put them in an awful position price wise, and mindshare wise. They can't just lop off $100 and call it a day. It would be at the price point the PS4 is at now, and still possess known-lesser hardware. Sony could sit comfortably without a price drop knowing this, or if they feel like they want to twist the dagger, drop their price even $50. Out of the 3, Sony is easily the master of hardware revisions to boot.
Worst part for MS is that Sony hasn't even pulled their ace yet, their first party studios. MS really gave Sony an opportunity here, and that's at E3 Sony can come out showing off what their main studios are working on and bury MS this gen.
Due to MS's decisions, I don't believe there's a comeback opportunity like Sony had last gen.