Don't kid yourself. This is going to be exactly like World of Warcraft because they need to incentive-ise "end-game" with something that is purely superficial. Enter, mounts and minions as frequent rewards. Why, they even talked about adding a mount to encourage more tanks to play tanks.

There will be hundreds of mounts by the time this games servers are packed up. It's simply the way Square-Enix want this game's direction to be.