Until there is a game without a type of Generic Races that are called different names to sound different(ex: High Elves, Dark Elves)with a generic Hunter Healer Warlock etc. class system with some talent tree that almost renames the skills, and equipment that has different classifications (ex:epic, legendary,common etc.), with a small storyline maybe through the first 5-10 levels of the game, then almost every game with labeled as a "WoW copy.
Honestly, most MMORPG's bring something new to the table but the rest is quite similar, leaving with practically the same generic system. I think having a story from the beginning levels to the end would be really helpful. The game Maplestory (although 2D and not amazing) incorporates a story from levels 1-50, which leaves another 150 levels of grinding but it is slowly getting there.
Another interesting feature from Fallout Online, which is kind of a current work in progress, is that is doesn't have classes. Personally I think this is a neat feature since you will probably be able to build your character the way you want. For example, a little bit of Gun Skill but also First Aid Skill.
Although I am not sure if FO will ever become made, I think if it does, it will become a great success because of how it is so set apart from the other games.
