Mobile web and sandboxing

I've had a few discussions in this blog about mobile web vs. native in app development.
One of the major problems with creating a mobile web app was performance. When an app needs to display a large list of items, rendering a huge DOM tree with lots of layers causes app performance degradation, resulting in poor user experience.
Well - The guys at sencha came up with a neat idea - 'Sandboxing', which means fragmenting your content items into small iframes.
The basic motivation behind this is that it's easier for the browser to render lots of smaller DOM frames than rendering one huge DOM tree. With multi core processors (And supporting OSs like iOS5/ Android 4 and above), this approach becomes even more effective.

You can read more about it here.

[Thanks Danny Livshits for the link]