The Xbox Series S will play Xbox One S games but not One X titles, here's why

Although most Xbox One games will run on Series S at 1080p or lower and may also take advantage of features like faster SSD, titles with Xbox One X enhancements like high-resolution, won’t run on Xbox Series S.

Best Xbox Series S deals: Save on the new Starter Bundle and 1TB Black model

Xbox Series X

Xbox Series X Review: A Power-Packed 4K Console

The Xbox Series X offers killer gaming—if your TV can handle it

How to enable FPS Boost on Xbox Series X and Series S - Telstra Exchange

All Currently Playable Xbox One Software—Besides Kinect-only Games—Will Work on Xbox Series X

Xbox Series X and S Review: Microsoft's New Consoles Are a Good Value. Is That Enough? - The New York Times

Xbox One Is Probably Here To Stay, Whether We Like It Or Not

Xbox Series X and Series S review: no-nonsense, next-generation gaming, Xbox series S/X