One guy calls the web a language, now someone calls Go a mobile application development framework. Come on, guys, we're programmers, let's call things by their right names. Go is a programming language, and technicalities like goroutines aside, you'd want it pretty much for the same reason why you'd want Java, Objective-C, JavaScript or, Heaven deliver us from the Symbian days, C++: some people think it's a nice language.
I think of Go as being a language and runtime as opposed to a "development framework", but why wouldn't you have it as a mobile OS language, particularly when compared to Java?
I'd love to see Go on Android. I doubt it will happen anytime soon though because it would require an entirely new runtime library environment to really be Go-like, just bridging Go to the existing Android Java APIs via Java<->JNI<->CGO<->Go would result in something very horrible.
