from xbox news release
Here at Xbox, we’re building the future of gaming by putting players first and ensuring that you are at the center and in control of your gaming experience. Whether you’re exploring an expansive library of Xbox Game Pass titles with more than 10 million of your fellow gamers or taking your...
news.xbox.com
"Well, it means that if you purchase the Xbox One version of a supported title, we will deliver the best version of it to your Xbox One, as usual. If you decide to jump into the next generation with Xbox Series X, we will automatically provide the Xbox Series X version of the game at no additional cost when it becomes available "
your progress and i am assuming dlc will remain with the move so you don't lose any of it from upgrading your console. i doubt you'll get another physical copy but rather you'd get a digital copy for the X console.