Google is either testing or possibly rolling out a new feature in the search results that allows users to see more content from a web site without having to click to the site.
Rather than showing normal Sitelinks, which are in the screen shot above on the left, you will be presented with more detail Sitelinks, which are shown in the screen shot on the right.
These new sitelinks will be listed under the main search result snippet with arrows down to expand the results. Here’s what it looks like:
Users can expand the number of sitelinks by clicking on “show more” and/or click on a specific sitelink to see more from the web site directly related to that sitelink directly in the Google results: