I am not sure if this is a Bing user interface (UI) experiment or just some strange Chrome malfunction, but for several days in Chrome (only) on my home computer (only) the Bing search results page looks significantly different. After a closer inspection, I realized the results themselves were not changed. It was just the background. For some reason, instead of the usual white, there is a blue-grey background.
Strange how disconcerting I found this. Then it changed back to white a few days later. So whether it was a UI experiment on Bing’s part or some strange function of Chrome, it is back to normal now.