Think mesh networking, resilient ad-hoc application clustering, non-Internet P2P, like Freifunk but everywhere. We shouldn't have to depend on Google or any of the big tech companies for anything except the hardware.
That would offer much more freedom. There are also contexts where this kind of thing could also enable life-saving applications. And unlike todays Internet where a database query in Cloudflare or a DNS bug in es-east-1 can disrupt half the services we use, this kind of technology really could withstand major attacks on infrastructure hubs, like the Internet was originally designed to do.