Eh, I could see microphone since it's now common to see people walking around with ear buds that all have microphones. That way I can make a phone call using the glasses. And like a heads up display with the time, count of messages waiting for reading/response, what ever other notifications.

Like imagine if a hypoglycemic person gets a notification right in their field of view. Before it effects their mood or bodily functions, when blood sugar is below a certain point "go eat something, current blood sugar is x". You can get these apps on your phone but you gotta check your phone. It's better than years ago where you needed constant blood draws to check every few hours but could be improved.

Maybe an alarm system to pops up "appointment with doctor in 45 minutes, leave soon to arrive on time". Now you can do it on your phone, but you can miss it if your not constantly checking your phone. The current solution is a smart watch but it would be better directly in your glasses.

None of this requires Ai. None of this requires a camera.

I blieve oakly sunglassea had headphone sunnies for bit.