Back in December 2016, Google introduced product schema for image search and announced it in April 2017. Now, it seems Google added a little identifier to the image results that have product schema on them.
They added this little icon that has a price tag and the word "Product" next to it so you can see which images have product schema and filter by images that have that schema on it. Again, the product schema feature is not new, but I think the label itself is.
Here are screen shots:
Images with product schema shows more structured data around that product than standard images. That is not new, again, the only new thing, I think, is the label. Although, I think Google had similar filters for some time now. So they added a filter for products and I think the label for products is newish too? But the labels themselves have been there for some time.
Sergey Alakov posted this on Twitter.
Update, I am being told the icon isn't new (although, I do think it is newish) but the filter is new.
Forum discussion at Twitter.