If you are talking accounts, yeah WOW will remain top dog. If you are talking overall MMO, TESO is better by most measurements except subs, old school combat, and raids. Graphics, Class Design, PVP, and world are far, far better in TESO. WOW is selling based on it's name more than anything fun.
WOW bores the fuck out of me. I personally have no idea how people can keep paying Blizzard, but if they enjoy the dailies or raids, more power to them. TESO's big problem right now is that despite having a class system that destroys WOW/EQ and great PVP their Combat is mediocre and the Diku setup is a bit tired for me.
There's a reason Blizzard are making wholesale changes to WOW in the next expansion <and really, the last>. It's not because they are top dog, it's because most of their playerbase who are actually sub based and Western are teetering on leaving for good.
I don't have much hope for EQ Next. It's going in the wrong direction, in my opinion. It's going to end up Zyngaland. The next revolution will come from a small shop that 'gets it' about player freedom and content.