Smart Delivery was already confirmed for Xbox Series X, but PlayStation 4 players moving to PS5 don
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Sony PlayStation 5 rumored to be backward compatible all the way till PS1, touted to be lower-powered than the Xbox Series X to meet a US$399 target - News
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Cyberpunk 2077 will be backward compatible on PS5, Xbox Series X - Polygon
Xbox Series X has revealed a new PS5-beating secret weapon
Cyberpunk 2077's PS5 and Xbox Series SX Versions Are Now Available — Austin B Media
PS5 and Xbox Series X backward compatibility: What you need to know - The Tech Edvocate
Is the PS5 backward compatible: Can you Play PS4 Games on PS5?
Cyberpunk 2077 - PS5 vs Xbox Series X Backwards Compatibility Frame Rate Test
Every Advantage Xbox Series X Has Over the PS5
Can the Xbox Series X run Cyberpunk 2077? - Quora