I just assume everything in public is audio/video recorded. In most places that's perfectly legal (with some exceptions). I don't think people should expect privacy in public. We faced the same panic about photographs when mobile phones started getting cameras. With some notable problems, everyone accepted it and moved on. The utility we get from cameras in phones is worth far more than the privacy violations which occur. The same thing is going to happen with this technology (and smart glasses).
I don't believe it. Photography was invented by non-Big Tech, and was widely popular and useful before Big Tech adopted it.
Miniature cameras on your body, and summaries of every conversation you have which you can store permanently, are concepts from either spy movies or weird sci-fi. I think it's a big mistake to see this as a continuation and not as a very different trend.
We may have to accept that Big Tech people are weird and cannot be trusted with any of this. See the Valley people now feeding all their personal conversations to agents. They are creepy and they are creating products in their own image.