With Chrome Instant (à la Google Instant), web pages that you frequently visit will begin loading as soon as you start typing the URL. (“Look, Mom – no enter key!”). If supported by your default search engine, search results appear instantly as you type queries in the omnibox. To try out Instant, you’ll need to enable it in the Basics tab of Chrome’s options.
Pretty cool, gonna mess with some sites trend / view metrics though.
Chrome 9 also enables WebGL by default, which is a pretty big deal.