Argonaut, true but wow also killed the mmo genre. Before wow, we had ultima online and dark sun online crimson sands, games which are true RPG's. Now, mmos are all about farming gear and managing cooldowns. Extremely boring. SP games also got infected by wow plague and even tabletop like D&D 4e.
Skyrim is a huge success and is a dumbed down version of oblivion which is a dumbed down version of morrowind