In one of his previous essays (can't find the specific one, but it talks about Cambridge) pg talks about how he thinks in the future startups might come more and more directly out of university towns because people with ideas already tend to congregate there, and mostly get drawn to hubs like Silicon Valley because of funding. As it gets cheaper to start a startup and need for funding decreases, this might not be so necessary any more.

Towards the end of this essay he talks about the possibility that people with ideas might start to congregate around other institutions than universities in the future. He does explicitly say that he can't predict how this will play out, but it would be really interesting to read his thoughts on what he thinks those institutions could look like, or just what features they might have in broad terms.

pg, if you're reading this, that would be a great future essay I'd love to read!