" Yet every single one of these platforms does cloud gaming in a different way. Each one is crafted for a different kind of user in mind, but right now none are as consumer-friendly as GeForce Now. Not only can you use it on PC, Mac, Android, iOS, Chromebook, and Shield (a media streaming device like Chromecast), but it’s free to use and it’s compatible with over 650 games that you might already own on Steam, Epic, GOG, or Ubisoft. "
" Stadia, Luna, and xCloud are all great, but I see them as the back-ups to GeForce Now. Their libraries are much smaller at the moment, and they all use subscription models that revoke access to your games once you stop paying. In the case of Luna ($6/month) and xCloud ($15/month with Xbox Game Pass Ultimate) your ability to access the cloud and play games on different devices goes when your subscription is up. Stadia does have individual games for purchase, but any games you get for “free” on its $10 a month Pro subscription tier disappear once your subscription is up. "
https://gizmodo.com/its-time-to-embrace-cloud-gaming-especially-geforce-no-1845589233