A lot of the evolution of user interaction on the internet is directly related to the interface elements that drive those interactions. The current web UI toolk

A lot of the evolution of user interaction on the internet is directly related to the interface elements that drive those interactions. The current web UI toolkit consisting of, for example, submit buttons, links with underlines, and navigation designed for page reloads, doesn't exactly complement the new designed-for-instant-interactivity backend in things like SproutCore.