https://wccftech.com/project-xcloud-will-eventually-be-on-every-screen-rather-than-just-mobile-says-spencer/

Project xCloud has been officially confirmed to be releasing in September out of its current preview. The cloud streaming service based on Microsoft's Azure platform will be included in the Xbox Game Pass Ultimate subscription tier, but that's just the beginning. As Microsoft's Head of Gaming Phil Spencer told The Verge, the availability of Project xCloud will be expanded over time both in terms of business models and platforms; while xCloud will debut on mobile devices, the ultimate goal is to be on 'every screen that someone can stream games to', featuring an accessible and smooth trial experience.

Over time we will continue to expand how we introduce streaming as part of the platform, and playing games that you own that aren’t part of the subscription. For launch, we’re putting it in Ultimate for no additional cost. We think it’s a good audience for us to start with, and it’s an audience that plays a lot of games.