I always thought it could be the evolution of Bittorrent: updatable torrents (with IPNS), peers sharing files from different "bundles" as long as the bits match.

The problem was that there was no good client for it that was better than current torrent clients. When I tested it you had to keep a duplicate of the files in the ipfs cache directory and the client was CLI based which would alienate most users. There's probably no way to have private trackers or to track seed/leech ratios for communities too.

It was also pretty slow (download rate wise), even if the destination and source node had a good link between them. I think the protocol had a lot of back-and-forth chatter, requesting blocks a few a time.