Search by Photos Snippet for Restuarant Queries in the SERPs

It looks like Google is starting to show Search by Photos snippet for mobile users when they search for restaurants related queries. I was not able to trigger them for desktop devices or for non-restaurant related searches. You get a carousel that you can swipe through and the results seem to be always shots of the food served at these restaurants. I think this is a great little feature.

Query: best restaurants in melbourne