The part about collating all human knowledge also reminds me of the optimism on the early Internet. I miss having such a positive and hopeful outlook on things, but again, can no longer bring myself to truly believe it. Maybe I'm just getting too old.
What I see as the most likely scenario is that for most users, this collation of knowledge will remain behind the oligarch gatekeepers, who can and will manipulate the output to suit their interests.
I know, I know, open models and such, but I don't see those making any dents against the oligopolies. People will still go to Google or OpenAI. No non-nerd is going to self-host a niche model, and the on-device inference most people will be using will be based on models provided by the same, manipulative oligarchs.
The degrading of Google's search result quality is actually a good indicator that this are heading towards more manipulation rather than unfiltered access to real, original human knowledge.