My point about “other face wearables” wasn’t so much about AR overlaid across your vision. I’m thinking more like a pair of glasses or a device attachable to a pair of glasses that has a camera that is aware of what you are looking at… and I mean aware of it before you get your phone out of your pocket and hold it up in front of you.
If you could just tap the frame of your glasses, then get your phone out and the screen, before you even unlock it, tells you all about the thing you just looked at. Like who it is, or how big it is, or how far away it is, or has already picked out the phone number or looked something up on Google for you.
Like the watch is always just keeping tabs on your heartbeat and activity and can just generally keep track of that, and you can look at that data in way more detail on your phone later, even if you don’t have your phone on you at the time (I usually go running without my phone). This isn’t the obvious job for a “watch”, but it can do it with the added sensors.
And Earpods are always just listening in on what’s going on, ready to reply to a question.
Watch is for movement and health, and has a small display for written information. Earpods are for sound, for both hearing audio and talking back to you.
Face-wearable would be the vision-input device which wouldn’t be relying on you having a phone with you at that moment.