I hope one of these companies pulls off a compelling set of glasses with a display and no camera.
It won't matter. People will assume it has a camera. The product category is most likely (and rather predictably) dead if it depends on people wearing them ubiquitously and in public.
I do think that people should be legally allowed to make recordings in public, provided they are not harassing anyone. I do not think they are entitled to make those recordings in secret; just have a regulated indicator, like the bluetooth led.