> UI in HTML5/javascript/SVG

I really hope this won't happen anytime soon.

While everything's possible, HTML+CSS is a really horrible choice for UI description, and the whole webapp stuf is a kludge. Webapps are only done this way because there's no other choice.

Developers are running away to more higher-level abstractions, which provide things that are completely missing in bare HTML+CSS. For example, there are so-called layout managers, which are at the core of every sane widget toolkit, but in HTML world, are only emulated with plugins like jQuery.UI.Layout (or implemented it pure HTML+CSS by re-inventing lots of boilerplate code).

Cappuccino and SproutCore have a very good reason behind them.