The problem isn't power, it's the latency of sending the video signal wirelessly. Latency is VR's enemy, if you turn your head the display has to update what you are seeing within 1/90 of a second, and no consumer device has ever sent wireless video that quickly. There's a company working on it that claims they'll have a wireless VR solution later this year, though.
Kinect looked terrible (glitchy as hell) from the very beginning, and couldn't justify itself in any way. And even if it worked flawlessly, it wasn't enough of a new thing - you're still simply interacting with your TV.
VR can't survive on cockpit games alone.
PSVR uses a full RGB subpixel arrangement rather than pentile style arrangement that VIVE is presumably still using (rift used to use pentile but I can't find anything that says whether they still do). That should make the screen door effect less noticeable than you would expect if you were to just look as resolution.
