This is huge. Finalization of the module loader spec is usually what's cited as the last remaining blocker for full implementation of modules in V8 [1]. Combined with HTTP2 being available nearly everywhere [2] and native ES6 support soon reaching most mainstream browsers [3], it means that web developers will soon be able to drop a large portion of the current JS stack, including spriting, Webpack, and Babel.
[1] https://bugs.chromium.org/p/v8/issues/detail?id=1569