To be honest - I think WoW will go in one of two ways - Blizz's next-gen-MMO that they are hiring for releases and replaces WoW, or so much time goes by that it's simply mega-dated (akin to comparing Runescape to WoW now).
The investment, both in time and money, is very hard to leave behind. Most gamers seem to require very compelling reasons to do so.
A good example - I have a semi-geared 70 gnome lock on a different server (complete with epic flying, all epic gems, etc). Shankk has a 70 gnome warrior... Sloko is now a 70 Draenei Shammy... Klr has an assortment of characters there, and his brother-in-law, best friend, one of their close friends, etc, are all pretty much 70s as well...
Better to say our focuse has shifted. We have a very small, incredibly tight guild there. DethNet was an incredible success - but also an epic failure in some ways. This is what we have after learning some hard lessons.
And, to be honest - DethNet is ambling along as well. Still has over a dozen 70s (and a couple hundred members). Just it's core membership (us) are no longer active, so 99% of the people there have heard nothing much from us, including any activity or reports about the forums.