There isn't very much to see here, if anything. A few meaningless microbenchmarks, and some "plain old JavaScript objects" that hijack jQuery's event subsystem so they can emit events just like DOM elements. We've been doing imperative, evented programming in the browser for years now.

Even if you're inclined to argue that this style of programming doesn't lead to a giant mess (and I'm inclined to believe that it does, even if you are the most disciplined of programmers) I still don't see the benefit of adding this 1K of JavaScript to my page at all. I can duplicate $.observable with a vanilla jQuery object.

To call this the "most powerful client side framework for building large scale web applications" is downright laughable.