Google constantly changes the look of changes and they are working very hard to make their search engine results more interesting and authentic. Google thumbnail image for queries like food are now live and many users including are now seeing such things.
Here is a screenshot of how google has changed for queries like food. I searched italian pizza recipe and below is what I get.
That’s really cool feature and many users simple love this. It is not related to rich card, as it seems like working for other sites too.