Here is an animated GIF of the topic refinements working, as you click on them, it toggles the search results based on your selection:
Paul Shaprio said “the button click animates between result variants without leaving the SERP.” “Really nifty,” he added and I agree.
Here is a video of it in action:
Check it out! pic.twitter.com/mXh9I52lcY
â” Dan Plante (@Dan819) October 4, 2017
This is what it looked like before:
I still cannot replicate this myself.
Forum discussion at Twitter.