The first Xbox-branded gaming handheld is expected to launch later this year. While Microsoft has not confirmed anything yet, it has been spotted revealing what could become the device's user interface.https://www.notebookcheck.net/Possible-Xbox-gaming-handheld-UI-spotted-in-official-image.983874.0.html
Could be a revamped Xbox window app. Similar to how GOG allows you to integrate your library.