Isn't Go more like the new Java? Python is probably still going to grow and Ruby possibly as well, while Java is disliked fairly heavily in many communities.
Go has ... code generation that isn't even triggered by Go compiler.
Java is a complex, mess of a platform for a reason.
It is so embedded in core enterprise systems that even if the language was frozen in place it would still be used for the next decade or longer. Even more so given that Java/Scala is the lingua de franca of analytics/big data which is all the rage right now in your Fortune 500s courtesy of Hadoop.
A big part of it is also the huge amount of talent from countries like India and China who have been taught programming via Java 6/7.