I don't really see the importance of it being a WoW killer, just like how do see it important for a FPS game to be a CoD killer (see BF3 discussions). As long as it is popular enough to form a sustainable community, that is all that matters.I've always been pretty pessimistic about "WoW killer" (ToR will be a failure too btw) type games, but this will probably be the closest so far. The models look good, the animations flow well, the gameplay looks dynamic, the environments look nice. Props. I like what I see.
I mean is a player base of 10m+ vs. 2m+ (random example) really going to affect your enjoyment of a game?
If anything I'd prefer games to find their own niche then just aiming for the mainstream and trying to be more like WoW to "kill" WoW.