That's a good question; if you think about fantasy MMOs in general, typically every class has "magic" of a sort--rarely is a class purely believably physical in all ways, even warriors and thieves have something supernatural about some of their abilities.
Being purely physical in single-player Elder Scrolls is easy, because the combat isn't centered around "abilities" like an MMO traditionally is. You just swing your sword over and over and over and over.
A warrior class with no abilities would not fit in a traditional MMO. Imagine playing a character with only an auto attack, and nothing more... because that's basically the equivalent of what you would have if they ported the combat directly from the single player experience.
I have no idea what ESO combat is like, but my guess is that there are magic flavored abilities and physical flavored abilities--I'm sure you'll be able to make a build that is purely physical. Making it viable might be a challenge... but isn't that what life is about? Do you really just want to do the FOTM build (which you know will appear as it does in every MMO), or do you want to craft your character yourself and make it work? Typically it is pretty easy to make any build in an MMO work, as long as you don't actively gimp yourself.
So don't write it off just yet! At least play the open beta (assuming they'll eventually have one) to see how you feel about it.