Via CyberNet [tech.cybernetnews.com] (includes screenshots):
The new layout will provide more information to users about a site simply by selecting the expandable arrow. Once the arrow is selected then more information will be displayed about the site, including a longer description/summary and a related image. They will also include related links to that site to help users find the information they are looking for more quickly.
This could be a good thing. If Webmasters are able to manipulate the SERPs (ie what photo appears ect) this could be a nice little 'billboard' in the SERP if it can in any way be controlled you could do a lot with it.