Backbone especially because it seemed so obvious to so many people that there needed to be an object-oriented "MVC" framework in the browser, and only over 5-10 years of experiencing the sharp edges and missing pieces did unorthodox alternatives (Flux etc) seem interesting.
And browserify, gulp, grunt, babel..
Babel for sure.
Only the first two are JavaScript projects (but do deserve a mention IMHO). The rest are more generally 'web platform' projects, but I think a thorough timeline covering the web platform more generally would be very neat/useful.
I think Coffeescript is more related to the modern JS flow (with all the transpiling) that Rome is trying to consolidate. But I don't think it's the OG, if memory serves Objective-J was first.
Ember, Coffeescript, sure, but I won't call HTML5 or CSS3 "best of JS".
The fact that these weren't even mentioned in the text after the diagram was disturbing to me.