Google is testing large images that you can swipe through in a slideshow mode for the local pack results. We saw this being tested for hotel related results but now some are seeing it for normal local results as well.
Phillip Barnhart spotted it and posted it on Twitter:
Selecting "more" from Google 3-pack occasionally triggering slideshow listings, including paid ads. New @mblumenthal @JoyanneHawkins ?? #GMB #GoogleMaps pic.twitter.com/WtLgpQUNsP
— Phillip Barnhart (@pbarnhart) October 17, 2018
Mike Blumenthal posted some screen shots on his blog as well:
Here is what I see, so you can see the drastically different design:
Forum discussion at Twitter.