Microsoft recently rolled out Xbox Cloud Gaming on the Xbox One and Xbox One S in over 25 regions. This feature allows gamers on previous-gen hardware to stream next-gen exclusive titles like The Medium via xCloud, opening a door to new cross-gen possibilities.
https://www.notebookcheck.net/Xbox-One-users-can-now-run-Xbox-Series-X-S-exclusives-via-Xbox-Cloud-Gaming-opening-the-door-to-a-new-approach-to-cross-gen-compatibility.580099.0.html