I dislike the power loss failure mode - it will prevent their use in places such as factory floors where AR will be very impactful, because a suddenly blinded worker next to heavy machinery is usually a terrible idea.
But I also appreciate how they solved the transparency issue of AR by instead of overlaying stuff on the real world, they just replaced it with an Apple-made one, which is insanely clever and totally Apple.
I also want to know what they can do with additional sensors - extending vision into IR and UV and beyond will certainly prove interesting, as well as providing better perception at low light.
The key thing is that it’s not a head set for an existing computer, but a computer with a new shape, with an OS designed for that. We shouldn’t discount the initial problems - this thing is impressive. It’s a quantitative improvement so large it will become a qualitative one.