http://www.gameinformer.com/b/features/archive/2012/05/17/what-makes-the-elder-scrolls-online-a-modern-mmo.aspx
I really liked Matt's comment about freedom to explore locations in any order, rather than, say, seeing a shiny tower in the distance but having to go to a town to get the quest first (as is the case with a number of other MMOs)