Not to be confused with Google Instant, which returns your search engine results before you’re done typing your search terms, Instant Pages from Google hopes to improve your load time once you make your click.
Here’s the idea. The vast majority of users click the #1 search result. So, while Google is waiting for you to review the search results, just sitting their idle, why can’t it be pre-loading that #1 site in the background? That way, if/when you click on that ever-popular 1st search result, you won’t have to wait for the page to load. Because Google has already downloaded the necessary items in the background for you.
This feature will only be released in Google’s proprietary browser, Google Chrome.