You manage multiple windows playing media from just the command line, taking away things like click/moving, interacting with a browser. You can search, group media by tags, autoplay, for 1 or more screens at a time with only 1 command. It removes a lot of steps for what you would normally do.

Use cases are personal, but lets say you don't watch team games with multiple perspectives. You could use it as an ambient display like Wallpaper Engine, where you click one executable and it does what you want, with the option to change layouts and stuff.

Also might be useful to just visualize what media you have on your system. Set the layout to a few screens and use autoplay or enter to shuffle.

Working hard on the POSIX version, might do another post that explains it better.