Not to be pedantic, but are UglifyJS and Babel "frameworks"? Not a Ember user, so maybe Ember has some sort of built-in source code transformer and that's what the author is referring to?
I think the basic idea that JavaScript developers, especially those working in a browser environment, will increasingly write source code that compiles to JavaScript "bytecode" is not a recent idea. A much more nuanced reflection on that idea can be found here: http://composition.al/blog/2017/07/30/what-do-people-mean-wh....
With all the hand-wringing about "JavaScript fatigue", it's a little bit sad that prominent JavaScript developers use titles like "Compilers are the New Frameworks". The tone of this title is the tone of a bell ringing for the next round of JavaScript fad musical chairs.