WoW graphic overhaul?

World of Warcraft producer J. Allen Brack recently told Eurogamer that they might at some point do a graphics overhaul for the game. He goes on to say that it hasn't really helped some games in the past (definitely true - Everquest's overhaul alienated players with slower PCs and introduced unpopular new character models) and that they need to be really careful about how they do it. It's likely that the game would likely get higher quality character models and new textures could be painted on everything, like items, characters, dungeons and terrain, but the actual landscape wouldn't very likely change. Then there's the possibility of keeping all the old graphics and models in, and the fact that WoW is already up past 7GB on people's hard drives. While I always thought the game's graphics could have used just a little more oomph in the technology department, half of its appeal comes in its low system requirements. I wouldn't expect a graphical revamp