A web version of Xbox Cloud Gaming, or xCloud, would allow Xbox players to access their favorite Game Pass games directly on the web. This would essentially open up the ability to play Xbox Games on multiple platforms outside of the ones they already support.
The web version of xCloud will work the same way as the Android version works. You will gain access to a simple launcher that offers you "recommendations for games, the ability to resume recently played titles, and access to all the cloud games available through Xbox Game Pass Ultimate."
Selecting the game you want to play will open it up in a full-screen window, and currently, it is required that you have a controller to play the games through the browser. Keyboard and mouse support has not been mentioned as being supported.
The browser-based client's internal testing is a good indication that a public preview is soon to come. A web version of xCloud will allow gamers on both PC, Android, and iOS to access their favorite Xbox Games. It would theoretically allow PC players with macOS or Linux to access the service, as long as they have a Chromium-based browser.
The more platforms supported, the better!