It’s like the cameras in the glasses. If all they said is what _I_ know (“That’s Julie who worked in the same group as you at company Z three years ago. You also ran into her at the grocery store shortly after you quit Z and it was awkward” but not tell me anything about Julie I wouldn’t know, like spouse or where she now works or anything like that”) it would be an excellent prosthesis. Public figures have humans who do this for them.
Unfortunately the glasses makers don’t understand the difference and make it too general and privacy destroying. This Apple thing might be OK in my opinion..but the reality remains to be seen.