The elder scrolls online, ive watched and ive always said that, no, warhammer online wont kill wow, rift wont, guild wars 2 pfft what... Star wars? wasnt a plan to play it either way but i was never concerned it couldnt tackle the giant.
WoW is generally the only game i play, besides a good retail that comes along like assassin's creed and Skyrim last year.
Skyrim, one of the best games i have ever played, a retail game like assassin's creed that pokes it head out and makes you give wow a rest while you play it.
Im not a huge follower of the elder scrolls but we all know it has a huge backing and the universe for the entire region(s) of tamriel is gigantic.
The one thing i believe that made wow become such an unrivaled mmo was warcraft 1-3, it had its back story that made it so full that every other online game like..'rift' seem so hollow is how i'd describe it.
Now the next 'wow killer' is out and it has the similar loyalty of its retail games like wow did.
If the elder scrolls online becomes a threat it will be because they've sat back and watched everyone elses mistakes like SWTOR did by not being as updated as wow was, wow has every utility imaginable for a guild, SWTOR didnt, i mean we've all seen francis's rave on youtube http://www.youtube.com/watch?v=JToIHroU-WY.
As he complains about no duel spec, no guild banks etc, this is why wow stands so far above the rest of online mmo giants is because they have so much utility, the only way TESO is going to be a threat is if they have implemented the right utility and flexibility of the things you can do like in wow, and because of its fanbase.
But at the end of the day.. whats going to make wow so much better if this game becomes a real threat to blizzard is because wow will HAVE to complete its character model updates possibly next expac!
Not confirmed but thats just what i think blizzard will do next to rival TESO because it cant beat its fanbase out.