As of the moment, cloud gaming is possible on Android devices. The beta version of the Xbox Game Pass Ultimate perk currently supports more than 200 games. What's more, that number is growing by the day with more and more titles starting to support touch controls.
However, this has famously left out the PC platform and the iOS.
The latter, specifically, has prompted Xbox Head Phil Spencer to criticize the experience support for Apple's mobile platform as a "bad experience.
With that said, it seems that, after months of working on it, Microsoft is closer than ever to making cloud gaming for iOS and PC a real possibility. As a matter of fact, they hinted in a recent video that it's going to come soon. Microsoft Poised to Deliver on Spring 2021 Promise In December 2020, Microsoft said that they will make cloud gaming a part of Xbox Game Pass Ultimate on the PC via the Windows operating system and iOS devices sometime in Spring 2021.
Many months later, it certainly seems like they're going to hit their mark.
Just days before the spring season begins in some parts of the globe, Microsoft released a new video that essentially serves as an official walkthrough and demo for cloud gaming. https://www.youtube.com/watch?v=upsXLBIoR9A In the said video, VP of xCloud and Engineering, Kevil LaChapelle, hinted that they're going to bring cloud gaming to iOS and PC soon. He did not give a specific date, however LaChapelle did clarify, with a wink, that cloud gaming for iOS and PC is not "very far off".
As of the moment, Xbox Game Pass Ultimate's cloud gaming parking is available in as many as 21 countries. This includes South Korea and parts of North America, as well as Europe. However, Microsoft is working hard to make it available globally.