Read an excellent post over on We Fly Spitfires, where the author states his view that Blizzard are moving towards ‘all DPS’ gaming with both Diablo 3 and WoW.
I agree that this seems very likely given the problems with DF queues and in particular the tank shortage.
But I do not see this as a good thing. Rather it means MMOs that follow this pattern will devolve into chaotic loot-brawls. Grouping will become less and less popular if there aren’t mechanics to mandate it. The holy trinity may be a crude and artificial mechanic but it does promote good cooperative gameplay. If we’re all DPS what’s to stop everyone from playing the ‘huntard’ role instead?