Well all the lvl60 guys won't be bored for long, there are going to be quests for lvl60+ whhich means they will most likely raise the bar on the levels agaiin. For us mages I am assuming they will lower that mana shield by the mage fallen city near the alterac mountains and from what I've heard from a few pallies and the like each class is getting lvl60+ epic quests, seems to be a lot of talk about it on the blizzard forums with the staff hinting to yes answers.
On a side note, I was in Scarlet Monestary last night, made 120,320 xp doing the armoury, the dog boss and the grave yard, made 32 gold over all after selling items, a good place to grind for lvl30 (in a big team) to lvl 40 with a decent sized team. I have been in there three times now and still the boss hasn't dropped the rod I am after so back in again tonight.