I agree mostly, but I've been pretty impressed by the Bigscreen Beyond. To me, that is more than small enough to be mainstream, but maybe that's just because I'

I agree mostly, but I've been pretty impressed by the Bigscreen Beyond. To me, that is more than small enough to be mainstream, but maybe that's just because I'm judging it by the amount of size/weight it dropped compared to Meta/Valve's offerings (acknowledging that their requirement for a personalised, 3D printed plate to be put on the front is fairly inelegant). I think at that size, fully wireless is the chokepoint on further adoption.