Granted they can fix the narrow fov of hololens and actually get it out for an affordable price, I still don't see how it is more interesting than VR?
That minecraft in your room demo looks pretty cool, yet why not be in the world, instead of still sit in your room.

Hololens will be cool for multiplayer games playing out on the table in front of you, it definitely has local social possibilities which VR can't provide. However how much is that going to cost, a headset for each player. Hololens will have a smaller subset of games that are suitable for it. Ofcourse once the fov issue is fixed, a simple shutter can turn it into full VR. It still will be more expensive for just a few more games.
Hololens has tons of potential, yet for gaming it's rather limited.  Sure in a couple decades you might have a simple lightweight headset, not much more than your average sunglasses that does both. For now Hololens is the next Illumiroom.

Here's that infamous video https://youtu.be/RE6GtnAXQSs?t=205

Sure, you can play xbox one games on OR at a lower resolution, in a virtual room. You can hear the crickets in the room after the announcement. Of the 1200x1080 per eye, the actual (still 2D) game only takes up less than a third, maybe half in pixel density. Completely pointless, just stream it to a tablet if you need a second screen.