The storage wars are over. Server SANs won. Everything else is just jockeying for position. Arrays will begin their gradual decline. It'll take 25 years for them to fully evaporate down to their concentrated remainder, but they'll follow mainframes as a zombie tech.
In the meantime and between time, it's all about who can provide the best server SAN. After that comes rolling in other features to help migrate people to server SANs. (Datacore, anyone?) Then maybe arrays to deal with niches or as a temporary point solution.
Software defined network is the new battleground, and with it, the first real skirmishes that will mark the beginning of the software defined infrastructure wars.