Microsoft will grant more computing power in SDK level for Xbox Series S
While it is true that the Xbox Series X supports 1440p screen resolution without a problem, Microsoft always had the Xbox Series S to cover that turf where people are fine playing on a 2K screen.
But the almost 2 year history of Xbox Series S has been constant and it is the difficulty of developing games in parallel with Series X and alway ending in a game built for S being below in performance...