It's hard to imagine using these for more than 30 minutes in my day. If I'm at work, whatever these can display I'd rather have on my monitor. When I'm socializing, I wouldn't want random popups or notifications, and I certainly wouldn't want whoever I was with to be looking at them either. So that leaves some pretty narrow use cases such as the cooking example in meta's demo, which might be interesting if it actually works well (the demo did not inspire confidence). So I'd end up using this maybe 30 minutes, every 3 or 4 days? Most of the time I know what I'm doing with my ingredients and don't particularly need AI assistance to combine noodles w/ sauce or whatever I'm doing. That's a very, very hard sell.