Obviously Go isn't going to replace every existing piece of Java software. That's a very strange takeaway from the parent comment. The point is rather that Go

Obviously Go isn't going to replace every existing piece of Java software. That's a very strange takeaway from the parent comment. The point is rather that Go occupies the same niche as Java, and does so arguably better. As such, "Java killer" means new software projects are going to increasingly favor Go over Java.