The lines between the two have been slowly blurring for some time now. My crystal ball says that will continue as the need for cross platform support, especially desktop versus mobile, gets bigger. I think we'll see more and more emphasis on 3rd party VM type frameworks, like JVM, unity, and electron. However with Moore's law reaching an asymptote I believe that writing for performance will also become more and more important. I think these forces will result in a high demand for the skills needed to improve performance on all types of apps.

What I'm hoping for is a pendulum reaction to the recent trends of UX design, where we see a renaissance in really solid interfaces that focus on discovery and speed. But I'm not seeing signs of that yet.