Google has added to Google Image Search results a feature to see recently viewed images that are related to the image you are currently looking at on Google Image search.
Sergey Alakov posted a screen shot of this feature on Twitter and you can see the recently viewed section is below the image preview. Here is that screen shot (click to enlarge it):
As Sergey noted, maybe this is just an early sign of what is to come from Google around image search changes?
Forum discussion at Twitter.