To me, it sounds like a wearable device that just listens to (and see's?) everything, all of the time.
From a technology perspective (for OpenAI), the amount of data they would then gather would increase exponentially. I'm not too sure how it would determine targeted input vs data poisoning, but I could see it being useful in some context.
From a privacy perspective, it's beyond awful.
One company that basically has almost 100% knowledge about you is terrifying. See what you're seeing, know your location, hear what you're talking about, know who you're interacting with, even sensitive/personal information would be tracked and sent to the cloud.
Imagine the retargeting efforts, and adverts you ended up being exposed to...