If you have used Google in the last few months, you may have noticed a new feature that allows you to see a small preview of a web page in search results without having to click on it. This feature, Google Instant Previews, is now available on Google mobile versions of Google search.
From the Google Mobile Developers' Blog:
"For example, if you’re looking for a webpage that has both photos and descriptions, you can use Instant Previews to quickly identify these pages by navigating across the visual search results with a few swipes of your finger. Or perhaps you’re looking for an article, a step-by-step instructions list, or a product comparison chart—with Instant Previews, you can see easily spot pages with the right content without having to navigate back and forth between websites and search results.