Testers from the Windows Insider program report that the latest Windows 10 builds feature a new app called Microsoft Gaming Services that adds direct access to Xbox APIs and allows users to download and install games directly from the Xbox distribution servers. Moreover, the 2020 update planned for Windows 10 could integrate seamless compatibility between the two platforms.
https://www.notebookcheck.net/Microsoft-may-soon-enable-Xbox-games-to-run-on-Windows-10.410814.0.html