Unfortunately the legal fight between Oracle & Google has really made me doubt that the cool new language features will be coming any time soon to Android.
That would be a step backward, we really need generics and a reasonable support for exceptions on Android (or any large scale system, for that matter).
Go is a fine language at the system level or to replace Ruby/Python scripts but that's about it.
My beef with Go is weak web-programming and prototyping support and immature libraries. I'm surprised there's been so much uptake in the Ruby/Python communities, which are very strong in those areas, but I guess Ruby/Python are now being used outside their original domains and those use-cases are pretty ripe for a language like Go.