I’m sure there are possibilities today to get this via a rest sensor to take the URL from a json source by using GitHub - TimothyYe/bing-wallpaper: A RESTful API to fetch daily wallpaper from Bing.com and then manipulate the background properties but that could be great to have an easier possibility in the configuration dashboard to have every day an new background wallpaper.
This WTh is more for fun than a real feature but why not