As is always the case for me, even though I hate WoW (nothing personal; I hate all MMO's) I'm interested in seeing if the cultural phenomenon of something like WoW can be sustained into another iteration or if it was a one-shot "man, moment, machine"** kind of event. Of course WoW would lose more and more subscribers over time after reaching critical mass (which seems to have been ~12.4 million subs for WoW); the real test is when WoW2 is released.
** Based on the History Channel show, this is what I call a fortuitous joining of the right people making the right product at exactly the right time. It's success will spawn many copiers but none will ever entirely duplicate the success because the requisite conditions are not there. In music, The Beatles would be an example of this.
“The greatness of a nation and its moral progress can be judged by the way its animals are treated.” - Mahatma Gandhi