Achievements earned on Xbox One versions of supported games will be transferable to Xbox Series X|S.
Xbox One players will be able to join multiplayer games with Xbox Series X|S players.
Backwards compatibility will be available for supported Xbox One, Xbox 360, and Xbox titles.
Smart Delivery will be available for supported Xbox One titles and allow access to both the Xbox One title and the Xbox Series X|S title.
We also have information on next-gen for the PlayStation 5.
Let us know if you have any questions!