The Windows login screen has been showing dynamic landscape photos for a loooong time. Of course, the part where you accidentally click on one of the search labels (?) and it opens Bing in Edge (previously IE), which is one of the three hundred ways you can accidentally open Edge/Bing in Windows, is not cool at all.

Windows can have Bing Wallpaper, which changes the wallpaper every day. It's not installed by default, but it's a fun offering from Microsoft.