On ultra wide monitors it's not ideal to view the Supademo in Full screen mode in the browser. The aspect ratio becomes off, and it's not a user friendly experience on Ultra wide monitor. Instead it would be nice to be able to have an option to open it in a Modal/Popup that fills up the current Window (application) screen. That way on Ultra wide screens you can have a more user friendly experience. For instance try to do it on a Samsung Odyssey g9. You will understand how uncomfortable it is in Full Screen.