Will it play? Yes.
Will it play well with high resolutions? No.
Probably will slow down during big battles...or if you just play DOTA 24/7 like me, no problem.
This being on low anyways.
OK regarding the OP's post. I have a totally NOOB question.
Regarding games like you mentioned, and things like WoW, how do you get them ON the device???
Apologize for my ignorance but I was curious about that.
WW
A lot of games can be downloaded directly from the developer's website. Once you register a CD-Key with Steam or Blizzard for example, you're free to download the install files from their servers as often as you'd like. If you don't have the bandwidth, you can always connect an external USB optical drive and install from that instead.
Games are more GPU hungry, so can we expect to play Starcraft 2 nicely on the new MBA 13' ?
I saw some videos on youtube showing a MBP 13' playing SC2 nicely. But keep in mind the screen is 1440x900 and the processor is 1.86Ghz, so how worse would that be?