I disagree.
If LinkedIn made AR glasses that told me who the person is I’m looking at (that I’m connected to on LinkedIn) and why/how we were connected, I’d buy that in a heartbeat.
The idea of wearing LinkedIn on my face makes my stomach churn, but while that's my personal reaction, is there a real world context you've found yourself in regularly enough that you've found yourself wanting such a product, or is it more like a conference thing? I can't even think of a physical space I've been in, ever, where there would be even one person that I'm both connected to on LinkedIn and don't know why.
VCs are a good example—founders will remember who they are for obvious reasons. But the ratio is way off—many more founders meet the same VC.
There are other industries where this happens as well.
Also, some people have problems recognizing faces in general.
Generally speaking, I'm bad at remembering names. I'd buy a discreet "remind me who this is" device in a heartbeat.
I could only hope that the EU would ban it ASAP if such a product existed making it unviable anywhere else. Except maybe China and such, should be pretty useful for the CCP enforcement agencies.