Re:This is what will kill WoW... (Score 1)

I think you're on to something. This is the appeal of Second Life and The Sims, and to some extent Oblivion and various FPS games which ship with map/mod editors. I'd argue that part of WoW's lasting appeal is in the same vein with its deep UI customizability. The capability to personalize and alter a game (or a game client) draws a player from being a passive user who interacts in defined ways with an immutable world, to becoming an active creator and shaper of that world--which is precisely the goal that almost all MMORPGs have aimed for, yet failed to achieve thus far (UO being closer than most as regards a persistent world, and WoW being the closest to complete UI customizability).