Disclaimer: I am a backend developer sporadically doing front end to speed things up (as in: back end is done, time to help the other guys with the front end). Why is this better than jQuery? I haven't looked at the full code base and documentation but did watch the 25 min demo video posted in this thread and thought: "Well, I can do all of this with jQuery too probably just-as fast.". What makes this different? Am I…
But I've seen codebases with over 10,000 lines of JavaScript, using only jQuery, and it isn't a pleasant sight. You either end up writing your own ad-hoc framework to add structure, or, more likely, you end up with a bug-ridden, unmaintainable mess where you're writing basically the same code over and over. A framework like Ember or Angular provides structure and takes out a lot of the grunt work of making a large, single-page app.