It disappeared as fast as it appeared. I did a Google search result that displayed a site at #1, but at the #2 position was a scrolling window showing up to date results of social media such as twitter. Some showing results that appeared only seconds ago. Then the rankings after that were just site listings again.
It appears that Google is doing some testing on a new SERPS (search engine result pages) and I like the idea of up to the second news and social media results to be included in the search results. I hope to see it again.