In September, Google added home services ads to the AdWords offerings. Since then, the design has changed for the ad format over the past several months.
Now, it seems Google is testing a new look for these ads on mobile - a carousel like look.
Here is a screen shot from Lee L Kennedy on Twitter:
Google responded to Lee about this saying the classic Google line, "we're constantly experimenting with how we display Search & Ads content on Google Search."
I personally think this works well for this ad type on mobile.
Forum discussion at Twitter.