The Xbox Cloud Gaming (formerly Project xCloud) is now in open beta. At xbox.com/play, I can simply select a Game Pass game and spin up an Cloud Xbox somewhere with my cloud saves and everything. It's very neat.
By the way, this game is a 1-4-player 2D brawler based on the Journey to the West with Rayman-inspired graphics. I should play this some more without lag.
I can't immediately determine if the cloud Xboxes are XB1 or XSX.