If you missed out on phase one though, you can still sign up for the Project xCloud Public Preview if you are in one those countries. Registration is free during the testing period, for all those who are accepted into the program.
The preview includes four games initially: Halo 5: Guardians, Gears 5, Killer Instinct and Sea of Thieves. They are presented in their complete form and additional titles will be added throughout the beta period.
There are some device caveats to be aware of before registration. To play during the preview, you need a phone or tablet running Android 6.0 or greater and with Bluetooth 4.0 at least, a Microsoft account and a Bluetooth-enabled Xbox One Wireless Controller. Xbox also recommends you acquire a phone mount for the controller, unless you are playing using a tablet.
The latter is reasonably inexpensive. We've found a pack of three of them for just £8.99 on Amazon.co.uk, for example.
Sadly, iOS is not supported at this time.
A new app has been made available for Android: Xbox Game Streaming. It can be found on Google Play for anyone in the supported regions to download, but only those accepted into the preview will gain access.
Essentially, not only does this beta launch allow users to get a feel of Microsoft's cloud gaming platform, it helps the team behind it to gather data to improve the service in time.