From an excursion on the Wandering Isle...and yes, I know it's not in-game yet, so put two and two together and come up with "beta tester", lol...
After having played World of Warcraft for about 6 years (quit playing about a month after Cataclysm released), I wasn't too tempted to buy any further expansion packs. But the notion of playing a Pandaren Monk, strikes me as quite intriguing. And from the videos i've seen of Mists of Pandaria, the environments look to be total kick-ass.
In short: I may be drawn into the realm of World of Warcraft once again. Time will tell (following releases of Diablo 3 and Guild Wars 2).