Microsoft's Xbox One game streaming service, Project xCloud, will get a public preview test in October, letting select testers play games like Gears 5 and Halo 5: Guardians on phones and tablets.
The public preview of Project xCloud will initially be limited to players in the United States, United Kingdom, and Korea. Halo 5: Guardians, Gears 5, Killer Instinct, and Sea of Thieves will be playable as part of the preview, and Microsoft says it will add more titles over time. Testers won't need to own the Xbox One games available during the Project xCloud preview in order to play them.
More details can be found in FAQ
Registration Link : https://www.xbox.com/en-US/xbox-game-streaming/project-xcloud [xbox.com]