The first Web 3.0 ideas are surfacing here. But web 2.0 is surely only 18 months old. Oh well, if the web can have generations then so can storage. So, here we go:-
Storage 1.0 - direct-attached storage
Storage 2.0 - networked storage, both files (NAS) and blocks (SAN).
Storage 3.0? It has to be virtualised storage I think, again both files and blocks.
Will Storage 4.0 be utility storage? Wait with breathless anticipation. Where storage leads, the web follows :-)