What would happen if browsers came pre-installed with Node.js, an IDE, and a simple runtime environment?

…there’s been a kind of revolution around coding. “Javascript everywhere” (i.e. node.js) has really become the default web-development paradigm. Javascript is alluring - partly because every computer has a javascript GUI and runtime - the browser! You can code in javascript on your computer using a text editor and a browser - without ever touching the command line!

But, what if a full-fledged dev environment for JavaScript was just as ubiquitous as the runtime in the browser?