Google Image Search on mobile search has added a “swipe to next” notice when you look at specific images in the search results. So when you click on a specific image, it will overlay for a second or two a message that tells you that you can swipe to see the next image. This was spotted by Mordy Oberstein and posted on Twitter.
Here is a screen shot:
I can replicate it and it seems to work as intended for me.
I am not sure if swiping is a new feature on Google Image search on mobile or if the message is new. I think the swipe is not brand new but just the message is.
Forum discussion at Twitter.