Had Google not stopped producing and iterating on Google Glass, we would have HUDs in our eyeglass frames, that would be useful.

I'm shocked that nobody has reproduced Google Glass. It was great even back then and it didn't take much to understand its usefulness.

No company that I am aware of has produced anything like it since

They stopped the glasses with tiny fov that weren't useful, but they have all (FB, Apple, Google, multiple startups like North, Xreal) been working on more subtle glasses continuously since then, it's just been hard and have needed display/power breakthroughs. Google announced new glasses again yesterday. Looks promising but live demo sputtered out at the end, still not gonna be ready for a while

Meta Ray Bans for sunglasses wearer who takes pics & videos using their phone are very handy; no need to take out or even have your phone to do either. Can also ask it for the time without needing your phone too.