If you were looking to play some Kinect Rivals on your Xbox Series X, then you are out of luck. Microsoft has revealed all Xbox One games will be backwards compatible with Xbox Series X.. besides Kinect titles.
”Your games will not be left behind, thanks to backward compatibility.You will be able to play four generations of games on Xbox Series X on day one. That makes it the largest launch lineup for any new console ever, with thousands of games to play. Our backward compatibility engineers have spent years devising innovative ways for modern, next-gen technology to make the games library you’re building today even better, at no additional cost and with no work from developers. It’s our intent for all Xbox One games that do not require Kinect to play on Xbox Series X at the launch of the console. And because of the unprecedented power of Xbox Series X, most of your favorite games will load faster and look and perform many times better on the new console.” – Phil Spencer, head of gaming
This is good news in regards to backwards compatibility. Microsoft has made sure every game besides Kinect titles will be playable on the next generation.