You know when Google shows you a colored header background in search for some queries? Well, Google is now testing a different interface for that where the header is a white background but instead Google uses buttons in bubble format that are colored.
Shalom Goodman spotted this and posted a screen shot on Twitter of this in action. Here is that screen shot:
Now, this is what I see (a day later, so ignore the Google Doodle aspect):
I like the bubble buttons versus the solid background color but that is me.
Forum discussion at Twitter.
Update: More examples:
Looks like Google is possibly testing some minor UI changes for entities/knowledge panels in the mobile SERP. The refinement bubbles are sticky as well (last screenshot). pic.twitter.com/r4uo3GT5ea
— Brian Freiesleben (@type_SEO) November 1, 2020