The nreal glasses show that a more compact sunglasses form factor is possible, though it's not doing anything cutting-edge, lens or compute-wise.
Everyone is so caught up in it not being an outdoor device which IMO is missing the point for the stage the tech is at right now.
Nailing down simple indoor use, for an entirely new computing plaform/interface, seems like a legitimate first step before people are walking around outside with it. All the 3rd party devs need to nail it down too.
Like stage 1 self driving cars, you use it on a closed track before you put it on the street.