Why would I want Elder Scrolls to be online when my favorite parts of that kind of game have nothing to do with online interaction?
Ginormous map? Check.
Lots of things to do on said map? Eh, well, there's enough to hold my interest for a while at least.
Lots of character class/playstyle options? Yep, even if I don't like some of them.
Aesthetic customization? Yus (but seriously would it kill them to give me a color wheel for hair/eyes/war paint?).
Has pretty much everything I need already without locking it to an online world where I'll have to deal with lag and group-required content.