In a post on Xbox Wire, Phil Spencer revealed that the Xbox Series X console will be backwards compatible with Xbox, Xbox 360 and Xbox One. Microsoft’s commitment to backwards compatibility makes the Xbox Series X capable of playing games across four generations. Additionally, Spencer said that playing older games on the Series X will make them “look and play better than ever before.”
He added;
Your favorite games, including titles in Xbox Game Pass, benefit from steadier framerates, faster load times and improved resolution and visual fidelity – all with no developer work required
The Xbox Series X also comes with something Microsoft is calling Smart Delivery. Smart Delivery allows players to purchase a game once and be able to play the correct version of that game whether it’s being played on Xbox One or Series X.
Xbox Series X
The example given by Spencer is Halo Infinite and that players will “only have to purchase a title once in order to play the best available version for whichever Xbox console they choose to play on.” All Xbox Game Studios titles will use this technology and it will be available for all developers to take advantage of.
CD Projekt Red has already announced that Cyberpunk 2077 will make use of Smart Technology.
Xbox Game Pass will also continue on Xbox Series X and will give players games from all four generations of Xbox. All first-party games will continue to launch on Game Pass as well.
Series X will launch in 2020.