This is the form factor that I always wanted from HoloLens (which I own). The release is very light on details of field of view and resolution (other than "best ever" puffery), that's where we'll get a better sense of actual use cases. The ball game shown looked very rudimentary in terms of only taking place in a small directly-in-front-of-user sense. This is also where HoloLens games fell flat -- you'd turn your head slightly to the left or right, and suddenly key game elements would vanish.

Edit -- the home page says 70-degree FoV. Not bad, better than HoloLens (45-degree FoV if I recall), but perhaps not enough to turn your head to the person next to you while still having game elements persist in vision