Notice that the smart glasses tech is improving fast. Intel recently showcased a very convincing (according to a reporter) prototype called "Vaunt". One advantage is that it looks basically like a normal pair of glasses.
I did see Vaunt! For someone who already wears prescription lenses, that looks fantastic. (And the camera was never a key perk of my Glass unit to me.) The biggest thing right now for me, is what software I can run on it, and how much control I have over that software.
I've been fiddling with a Vufine, which I can connect to pretty much any HDMI feed. Very cool, though it's a fair bit larger and bulkier than the state of the art.
Since this thread is about an article mentioning Black Mirror, I am reminded of the episode "crocodile". It depicts a tech that allows insurance companies and law enforcement to tap into people's memory and extract images of what has been seen.
Reading visual information from the mind is still far off, but if someday smart glasses become widespread, and assuming that they backlog their video input to the cloud or something, then for all intents and purposes, it'd be basically the same.
A very significant fraction of the population already wear glasses, so it's not too far fetched to imagine that soon, everything we see will be logged somewhere.
https://www.youtube.com/watch?v=bnfwClgheF0