Google seems to be testing a new design interface for the Google desktop search results. Here Google is filling in the white space you normally see on the left and right side of the desktop search results with more options. On the left side you see more search filter options and on the right you see related search options, to expand your search.
Adarsh Verma sent me these screen shots on Twitter - you can click on them to enlarge:
He said it only works for songs and games but does not work for searches on movies, books, artists, bands. I personally cannot replicate this at all.
This reminds me of some of the older Google search interfaces.
Forum discussion at Twitter.
Note: This story was pre-written before the Rosh Hashanah holiday. I am currently offline for the holiday and unable to respond to comments on this site, social, media or other platforms.