So keeping in mind that not only can this all change tomorrow but that we're talking about gearing the most gear dependent class in the entire game, let's start looking at what gear we're going to require at 80. The defense cap at level 80, for instance, is going to be 540 defense requiring 689 defense rating. For a fury TG build, you're looking to overcome 15% hit penalty on specials, meaning that you'll be stacking roughly 500 hit rating at level 80 (based on this forum post which seems like a pretty good test bed to me) not to mention all the crit and AP you'll need to be effective. Frankly, I think the defense gear will be easier to assemble than the hit gear. For arms, of course, you won't need nearly as much hit, making an Arms DPS build substantially easier to gear for. (To be fair, a fury DPS build designed around Impale, Rampage and Incite would also be easier to gear for.)
Of course, the real issue isn't "Does the gear exist" but rather "How easy is it for me to assemble a reasonably effective set for what I want to do?" Does a newly 80 prot warrior have a chance to tank the instances and heroics? What about a DPS warrior, will he be effective? So far, it seems that the gear exists, but can be somewhat difficult to assemble: the introduction of faction vendors in the most recent beta builds actually goes to help in these situations. This week we're going to look at the faction rewards and see what warriors would be interested in. There's also instance drops, crafted items and PvP rewards to consider before all's said and done, but we have to start somewhere.