Google Chrome 2, now out of beta, is less about exciting new features and more about better performance. There's nothing impressive about adding full screen support, form filling or full-page zoom, since all of these features are already available in most browsers.
Google's own benchmark shows that the new version runs 30% faster than Chrome 1.0, but it's probably a better idea to test the application for yourself.
Version numbers are not important and you don't even need to know that the browser has been updated: since it always runs the most current version, the new features are enabled gradually as they're developed, like in a web application. "A note on version numbers: we're referring to this as Chrome 2, but that's mainly a metric to help us keep track of changes internally. We don't give too much weight to version numbers and will continue to roll out useful updates as often as possible."