I’m the kind of person who believes that staying in a comfort zone keeps you out of “Where the magic happens”.
This year, a very popular web project (20.000 simultaneous access) that I worked (2008) was refactored from JSF to AngularJS and the backend in Java had the Service Layer exposed as REST endpoints using JAX-RS. As result of this refactoring, the server demand dropped from 100 instances to 20 instances because with AngularJS all the frontend processing happens on the browser keeping the servers responsible just to handle light REST invocations.
It is much probable that you will see more posts related to these subjects from now on. So here I drop a mental note to myself:
P.S. I still believe that Java will keep strong in the Enterprise!