So obviously one idea that's been floating around was the Jawa sand crawler from Star Wars. But there were other things I was thinking about while flipping through the screenies.
1) Stargate
2) D&D Online (a couple of the dock screenies made me think of it primarily).
3) Tattoine
I mean looking at Tanaris, AQ20 and AQ40 in general, I didn't really get a strong Stargate vibe..but Uldum (at least from these screenies) gave off a VERY strong Stargate vibe for me. I was half expecting to see a Stargate inside one of the interiors.