It seems Google Instant Previews is available to all, though still there is no official confirmation from Google. Don’t know how many users will like/dislike Google Instant Previews, however here are the benefits with Google Instant Previews.

Benefits with Google Instant Previews

  • Google Instant Previews allows a user to choose right page by providing graphical preview of search result by highlighting relevant sections for user search query.
  • Text callouts highlight where your search term appears on the web page so your can evaluate if it’s what you’re looking for.
  • Page Previews let you see the layout of a web page before clicking the search result.

Benefits with Google Instant Previews

Google Says how Google Instant Previews works “ With instant previews, we match your query with an index of entire web, identify the relevant parts of each webpage, stich them together and serve the resulting preview completely customized to your search – usually in under one-tenth of a second. Once you click the magnifying glass, we load previews for the other results in the background so you can flip through  them without waiting”.