Perhaps for photographers, and ultra-small VFX/film studios, where those directly-connected arrays contain the life of the studio. But that's certainly not going to be true for mid- to large scale studios, where storage is measured in racks of Isilon and/or Blue Arc servers (and even small studios frequently have at least one). Those directly-connected arrays will be used for work-in-progress but how does that work-in-progress data get to and from those big, honking servers to that directly-connected array? Ah, that's right... the network.