The depth of difference, between "sandbox" type MMOs (of which Raph seems to be a prime exponent) and the WOW style content-tastic MMOs, needs to be bridged by a game developer....and that game will rule the world. Since SWG I've tried WOW and loved the grind up to 60, then dropped like a stone. I've also tried EVE, and been initially stunned by it's lack of programmed direction.....I love it now, but alsmot gave up after the tutorial when I realised I was on my own.
SWG certainly had the background material and depth of scope to pull off the hybrid MMO and clean up. But several issues led to it bleeding accounts shortly after January '04, and this was noticeable in game. With the war of the films as a background, PVP should have been a persistant to-ing and fro-ing within the SWG persistant world; instead it was a mess of laggy base battles, bugs and tine consuming "rules" to win. Who wants to be a "bio-engineer" crafter class, just to blow up a rebel base? The jedi wars should have been seperated from the mass of the rest of the game, a kind of gentleman's club for the veterans, instead it became an easy way to win PVP battles leading to the ordinary player giving up through sheer frustration at their dominance of the imperial/rebel war.
WOW has been the success it is because not because it's won over the standard net-gamer crowd, but because it caters to the non-dedicated portion of the computing community. Led by the emergence of cheap broadband, suddenly everyone is becoming a net-gamer. And what better introdution to the worl of MMOs than a game that is polished, has no bugs, is fair to all....and most importantly leads you by the hand all the way to level 60. All the hardened gamers I know have left WOW at 60 as the challenge is gone and there's no variety to distinguish yourself from the other 2000 Night Elf Druids at ironforge. But as long as the casual players get their nightly fix of WOW action, Blizzard will dominate.