These features would be it. Even if you've never heard of Go, or never used it, as a programmer I think these built-in concurrency features are easy to appreciate.
But all-in-all, I think I had been waiting for something like Go with it's concurrency, easy dependency management, and awesome command line tools to give me a warm starting point to compiled/lower-level languages. The speed and flexibility of compiled languages isn't really yet matched by any scripting languages, and the techniques you learn writing effective Go code can make you a more well-rounded web developer. Learning to manually manage memory (to a higher degree, anyway) and all the values being returned and sent to all functions and all of their types may just be a lesson in frustration that you'll find well worth it in the end.