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We've seen variations of Google showing image carousels in the featured snippet position, but this one seems new. If you search for [seo checklist] on mobile you may see a featured snippet that also shows an image carousel that lets you click on the images to see "more results" for that answer.
Here is a screen shot:
John Lincoln spotted this and posted it on Twitter. I am not sure if this is a 100% new, because we saw similar variations of this but it might be new.
Forum discussion at Twitter
