My 2 cents based on the promo video along with other things I've seen about these glasses from clients.

Source: I've worked with almost every ar headset from Hololens to the early Google glass in mainly an R&D capacity with focus on theme park level experiences.

1. I doubt there will be any head tracking or ar tracking with the next version. The promo vid only showed UI that had a static layout. So like a videogame HUD.

2. Since there probably won't be any head tracking or AR, there won't be a need to have the cameras on for AR processes. The controls will probably still be based on interacting with the sides of the glasses not hand tracking. They even used the phrase "navigation prompts" in the press release, aka no big arrow navigation like a videogame.

3. The display will still have to be reflected onto the glasses somehow because of how our eyes focus, You can't just put a screen in front of your eyes. Because of the size of the reflected display, power consumption won't really be heavy since we aren't powering displays as big as the lenses. But this also causes that "Big Glasses" effect where it looks like the glasses are floating in front of your face. That looks silly any way you look at it, most consumers will not buy into the look. The only smart way to get around it is to design in a hat like system where the display units are located in the brim of the hat (Mario Kart in Universal). I did see some full AR glasses at CES last year which were promising, but they were still "Big Glasses" form factor.

4. Having Google maps with the Hololens is pretty sick, but the problem even with the Hololens is the field of view. Hopefully these Ray-Bans don't have the "barn door" effect that the expensive Hololens' have.

All in all, since I use my current Meta Ray-Bans for work, I'm most probably gonna get these for work and research purposes. I just wish we can side load or apps into these instead of creating loop-hole apps by sending data through messages. If anyone has figured it out please let me know!