It is interesting. I can also see it on google.it, but not on google.co.uk nor google.com. However the images do not show next to all SERP entries, just next to some, and I am only seeing them on the first page of SERPs.
WpSEOit
2:49 pm on Sep 19, 2016 (gmt 0)
I saw also in 2nd page of SERP and me too can't replicate it on google.com or co.uk