Well the QQ is about the fact that its probably going to be mainstream. TES is so successful due to it having an identity of its own, but when you make a multiplayer games the rules are differen from single player.
In multi you can make up any kind of bullshit story, made-up world, classes, factions, magical sticks and pants, but noone will give even a single fuck, if there isnt anything special that makes it stand out from the crowd. TES online hasnt really shown anything we havent really seen before. The name "Elder Scrolls" is the only part that sells in this case, without that name nobody would even care.