GP can be used to stream games to your other (non-Xbox) devices using Xbox Cloud Gaming. It’s a monthly fee, and sorry but I only tested it out briefly when it was first launched so I can’t speak to the lag an video compression fidelity. I do know that Microsoft put a lot of $ into ensuring you could use cloud gaming without top of the line internet speeds. I’ve heard that you may notice a slight delay for competitive online games like FPS but won’t notice much of a difference for single player games.