With the launch of Google Instant, Googling was even quicker and gave searches which were more relevant in lesser time. Now Google is making a huge leap by entering into Image based snapshots – a new kind of visual preview which is called Google Instant Previews.
Google Instant Previews will previews all the right results in a graphical manner with the text matching the search being highlighted. To use it, click once on the magnifying glass next to the title of any search result and a visual overview of the page will appear on the right. From there, hover your cursor over any other result to see a preview. For those of you, who’ve recently stopped using your mouse to search, now you can navigate to a result, hit the right arrow key to see the preview, and hit the down arrow key to keep browsing.
With Google Instant Previews, you can quickly compare results, pinpoint relevant content and also be able to interact with the result page.
Reference: Google’s Blog