a shift is taking place: "Now we are finding that it's not just about the code; it's about, 'Hey, I want to work on this with you.' That's really eye-opening to us and gets everyone here superexcited. Working with someone else is just an awesome part of being alive. Creating art, creating tools, creating documents, doing homework, anything--it's not limited to programming. I don't see why musicians wouldn't want to work this way, for example."
Take that, and now consider how much a forward-thinking city could do with its data as GitHub adds features like this. I don't think it's about being just an IDE/app hosting service ... it's (eventually) about collaboration/control/revisioning beyond purely software projects.
[1] http://www.inc.com/magazine/201303/will-bourne/2-reasons-to-...