A new Feral Druid blue post

It looks like my thoughts on the subject were correct. As a feral druid you will be able to spec in order to be a viable Main Tank, viable raid DPS, or spec for both and continue to be the best OT in the game. In between all that we can spec for PvP and start to own face there. This does mean however we are back to collecting a ton of different gear for our different possible roles, that has been left unchanged. At least with the new pets storage we will have more space for all our gear.

Q u o t e:

The design is for bears to be viable, end-game main tanks. The design is for cats to be viable, end-game melee dps. In both cases you are going to need the right talents, good gear, skill and companions who can back you up -- I don't mean to imply raiding will be easy.

If you want to do a little tanking and dps, you probably won't be as optimal at either, though you'll probably always be better at switching between the two than other classes. In order to be as good at tanking as the other classes, you might have to give up a few talents that maximize your dps, and vice versa. This is a good thing -- it lets you choose to actually be a main tank.