>so anything that's already challenging current infrastructure, like livestreaming video, is right off the table
For a wireless mesh... yeah, probably. But if you relax the requirements to include things like small home servers (still using the internet), things that challenge centralized infrastructure can be very doable.
With good network connectivity, there are things that decentralized services already do better than centralized ones. Distributing files to a large group of people is much easier with BitTorrent than hosting the files directly would be; the bandwidth requirements are themselves less centralized in a peer-to-peer system.
For a wireless mesh... yeah, probably. But if you relax the requirements to include things like small home servers (still using the internet), things that challenge centralized infrastructure can be very doable.
With good network connectivity, there are things that decentralized services already do better than centralized ones. Distributing files to a large group of people is much easier with BitTorrent than hosting the files directly would be; the bandwidth requirements are themselves less centralized in a peer-to-peer system.