Google announced three new features in Inside Search event.They are Google voice, image search.And the other one is Google Instant Pages.
Google Instant pages is the new version of Web Accelerator, a software offered by Google long ago, which pre-fetch certain pages in advance in the background like the top three links on a Google page, so the corresponding pages loads instantly on your mouse click.
Now Google re-launched the Web Accelerator with a name “Google Instant Pages” and ad that piece of code to Google Chrome web browser.
image courtesy by digital inspiration
Instant Pages will pre-fetch few pages which are having chances of a user click on your Google Search page.So, when you click on that page, it loads instantly with the blink of an eye.
You can test Instant Pages on Google.com using the dev version of Google Chrome.Google will include this feature in the next beta of Google Chrome and also extend this feature to other websites also.
Here is the video demonstrating the Google Instant Pages.Comparison of Speeds with and without Instant pages.