We've seen Microsoft test variations of expanding sitelinks within the Bing search results before. But here is a different variation on that, one that expands and shows descriptions under the sitelinks after you hover your mouse cursor over the specific sitelink.
This new one was spotted by Sachin Patel who posted on X and on Search Engine Watch a video of it in action. Here it is in GIF format:
I don't mind this version but I don't have much to say about it in general.
Forum discussion at X.
