Sticking with the upcoming MMORPG's theme of building-plus-battling, WildStar's high level 40-Vs-40 PVP battles begin with players building massive fortresses in the sky. Then they drop them.
It's a build-your-own-battleground sort of thing. Two groups of 40 players trick out their floating bases, drop them onto the battlefield and then beat the tar out of each other until one side runs out of tar. There are resources to gather, massive robots and creatures to unleash, and plenty of heinous slaughter take place on the ground between the two bases.
I dig it. I'd be crap in battle, but I could see myself designing a lovely battle platform and then sitting back while my
peons friends take care of the rest.