A modern file system for the networked world would need ways of addressing data across the whole network and indicating backups, duplicates, old versions and arbitrary metadata too, like face tags for photos, the authors of a document, things like that. It should also, preferably, have a way of indicating that a certain file is a member of some kind of "bundle" that should come along with it, because zipping files just to keep them together is a bit silly. Not essential, but nice to have, if it's not too confusing.
The next question is what do we do with such a file system? Just keep all our personal files accessible everywhere, or something more substantial?
Mokalus of Borg
PS - I'm sure we'll think of something.
PPS - As sure as I am that I haven't thought of it yet.