Yahoo is testing a new user interface for the Yahoo Search results. Rubén reports Yahoo is showing large images on the right hand side panel of the search results for some queries.
For example, here is a screen shot of a search for [windows 8] on Yahoo, showing images on the right side of the page:
Rubén created a video of this in action:
For more details on how to see this yourself, see the All Google Testing blog.
Plus, for more tests by Yahoo, see our Yahoo User Interface section.