Google has added Instant Previews to specific mobile devices. Similar to Google Instant Previews for desktops, which Google implemented in November, the mobile version has a magnifying glass icon next to each site listing.
From there, users can click on the icon to pull up a preview of the site without ever leaving the search engine results page. This is a time saver for users looking for a specific type of a site or trying to avoid the scraper sites, dynamic pages, or the just plain ugly site.
Google stated on the Google Mobile blog that the Instant Preview feature will be available for Android (2.2+) and iOS (4.0+) devices for 38 languages. If Google detects a mobile version of a site, it will serve that version as the preview to the user.