Also, a request on the slideable element: On my Touchpad you can either slide the slider or tap the "grab" area and it slides over. Could maybe a click do the same thing?
Development is now in the open so you can see it progress, and you can easily fork it, make these minor adjustments, and potentially contribute back.
Enyo is essentially the application framework webOS 3 applications were written with, and its being re-written for cross platform support and has been made free and developed in the open on github.
https://chrome.google.com/webstore/detail/diejjofgldkjkhmfja...
Any webOS devs out there, please correct me if I'm wrong ;-)
A more serious answer: jQuery normalizes JS quirks across browsers into a unified interface, plus it provides a lot of goodies.
What jQuery isn't good for is organizing code. That's why Backbone and the term MVC have become popular lately. Applications need to be organized into something better than a big sloppy helping of jQuery callbacks.
Enyo allows you to build modular, organized code in a somewhat familiar way. I'd say it's in-between a big mash of jQuery and a full-blown MVC framework. If you want to think of it in an MVC way, it's like combining views into controller code...and I don't know where "models" fit in. And unlike Backbone, it provides its own built-in DOM manipulation and, as of today, a UI framework too.
I don't know much about Enyo, but it looks to be more of a framework for building applications, and provides things like layout management, controls, and an interesting "Component" model. I know that it was extracted from WebOS, so it may have some overlap with JQuery (i.e. by providing simpler methods of interacting with the DOM) but its goal is different.