Google Instant

Google launched instant previews on mobiles and while trying it out I got curious how they build that. It doesn't feel that you leave the browser when you click on the magnifier which takes you to the screenshots of the pages, but you it also doesn't look & feel like a classic mobile webpage.
So I emulated an android user-agent in chrome and inspected the source. Actually it is a XHTML page with some nice CSS animations and script magic.
Why is that interesting? AFAIK this is one of the few commercial products (Google's mobile search, not a small fish) which uses modern web-technologies providing a user-experience beyond classic web-page browsing.
Well done Google.