No, it will not. The big selling point of Java is its tooling. As much as some developers despise big IDEs like Intelij IDAEA or Eclipse, they are what is important to big customers.<p>As much as I would like Go <i>as a language</i> compared to Java, I would still prefer to use Java for any non trivial project just because of tooling.<p>Easy access to refactoring features offered by major IDEs, or test coverage tools, or CI will mean that I can safely change existing huge codebase much faster that equivalent Go source. That makes Java code to age much better, and prevents code bitrot if used wisely.
Architectures like JEE that offer very good patterns for big,complex projects to manage performance,ease of development and maintenance.The day GO can all of that , may be then.....<p>There are reasons for most big financial firms to prefer java over other languages....