I think it's mostly MacBook Pros (not Airs). Most of Google's services have a corresponding iOS app which requires a Mac to build / run a simulator. So if you'

I think it's mostly MacBook Pros (not Airs). Most of Google's services have a corresponding iOS app which requires a Mac to build / run a simulator. So if you're not actually picky about computer then it's more practical to have a Mac as it can handle debugging for Web/Android/iOS. If you're at a desk you can have a dock with a different keyboard.