OK, I have to go Google its nearest competitor now, to try to understand your point of comparison...

Edit: I think you're talking about Hololens, which does put all of the batteries on your head. Yes, I think you've correctly identified another company taking a different approach. And you've correctly identified the usability trafeoff associated with the belt-mounted battery. I maintain that the tradeoffs are such that we will see many companies using non-head-mounted batteries in order to support longer use sessions.

Hololens is notably not good enough, graphically. Neither is Magic Leap. I don't contest that you can do a not-good-enough head mounted computer