I like Go, I've coded a few personal projects in it in the past, and generally like to keep up with the Go scene when I can.

However, I can't help but feel that if people want it to replace Java, then they need to make a robust IDE like IntelliJ or Eclipse.

I'm a Vim user at heart, but when coding in Java I find IntelliJ + IdeaVim plugin to be very productive. It goes far beyond just the classic auto-complete too, IntelliJ does a lot of neat stuff like suggesting updates to the code, or creating fields/methods and refactoring just as a simple key combination.