Super interesting that you mention this. I was just thinking the other day about what an absolute dumpster fire "the internet" is due to anonymity (obviously that's not the _only_ reason, but it's a non-trivial reason). This idea that "Let's give people the ability to be anonymous, and somehow, that's gonna make us all bond together and be better" is pretty hilarious in hindsight. Anonymity seems to just bring the worst out of people (that's not a tech problem, that's a human/culture problem). I would personally love to see a "web" where you have to comment...as your public self. Post messages...as your public self (not just on an individual platform level). So on and so forth.
I 1000% agree that eventually people will need some type of unique identifier to operate on the internet. And I'll take it a little further and say that in the future, anonymity will be reserved for the wealthy primarily.