Why? Because according to Stockton, there are "100's of daily quests at level 90."
The full blue post is as follows:
Update 4:20 p.m. EDT: Yes, that really is 100's of new quests at level 90...
It's open warfare between Alliance and Horde in Mists of Pandaria, World of Warcraft's next expansion. Jump into five new levels with new talents and class mechanics, try the new monk class, and create a pandaren character to ally with either Horde or Alliance. Look for expansion basics in our Mists FAQ, or dig into our spring press event coverage for more details!