Don't get me wrong, I love the Elder Scrolls series but I just don't picture it even coming remotely close to topping WoW. I am glad, however, that they chose to set the MMO in the past so they can still move forward with their offline games. --- http://i62.photobucket.com/albums/h81/GreatHammurabi/MySig.jpg
It's nothing like the singleplayer tes games at all. More like wow/guildwars with minor combat influences from Tes.
I hope it will be good but The only way this is gonna beat Wow if it has the free form character devellopment of Tes but seeing as all mmos follow the same basic guidelines for some stupid reason it will probably be another sucky clone.
My former WoW friends are huge on Skyrim, so they really want ESO to be great but even they don't have high expectations. I'll give it a chance just to play an MMO with them again though. --- Nobody circles the drain like the Buffalo Bills.