It's true: C++ is probably going to own AAA games for a long time, and, for desktop applications, you're going to tend to use the "golden path" dev environment for each platform (ie, ObjC for Mac apps, C++/Managed C++ for $50 Windows desktop apps. Right now, I'm not sure I know of a desktop app environment where Go fits on the golden path.

And, I'll restate: from the 1000-or-so lines of Go I've written so far, I'm pretty clear that I wouldn't want to use it for frontend web stuff (anything with serverside templates). But I'd probably use it before I would use Node.js for a backend web service, or maybe even for a single-page app.