Actually I would find it very informative to know if there is something similar. It puts things into perspective, says something about the novelty and gives a lead to a similar tool. I will then decide what's useful an what isn't.
The problem is, there isn't anything else kinda similar - Web Components will enable things that are impossible for libs like jQuery Mobile and jQuery UI to do presenting (with any degree of sanity). The Web Component APIs will also allow us to optimize the code paths most important to component development, again, something that will never happen for random UI framework X, Y, or Z.