Google seems to be testing yet another format for the local pack ads. @SilverbackStrat shared a screen shot with me showing a local ad pack which looks like the AMP carousel. A horizontal scrollable set of cards that you can scroll or flick to get more results.
In this case, it shows a map, followed by a normal snippet, then the location and then the phone number. This came up for Subaru dealers on mobile, which showed "3 Subaru dealers nearby."
Here is a screen shot showing the new ad format:
I think this ad layout is cool but from what I hear, the horizontal scroll feature is something many users simply do not understand how to use. Although, maybe that behavior is changing?
Forum discussion at Twitter.