And/or someone will make a business out of pinning files.

For public files, I hope that there will be several organizations organizing multiple long-term pins of files.

That's the best part! Anyone could be paid to pin!

Home users with enough bandwidth and storage. Existing CDNs. New cloud storage entrants (Backblaze).

Literally anyone with an internet connection and storage would be able to securely serve your content.

EDIT: I just saw your profile :) Thanks for the work you do at the IA!

For encrypted personal files?

No, this was IPFs being discussed (content addressable web).

Yes, but we were talking in the context of the grandparent post "IPFS is encrypted and with pluggable PKI too!", not of publicly accessible files.