Xbox Series X cloud gaming

when will this come https://www.ign.com/articles/microsoft-xbox-series-x-s-games-playable-xbox-one-cloud-gaming xbox series x games playable on xbox one old gen consoles via cloud gaming feature

But in all other write ups the game is listed as complete

Nov. 1

• The Legend of Tianding (Xbox Series X|S Optimized, Xbox One, PC, & Xbox Cloud Gaming)
  
• The Walking Dead: A New Frontier — The Complete Season (PC)
  
• The Walking Dead: Michonne — The Complete Season (PC)
  

Oct. 27

• Frog Detective: The Entire Mystery (PC)
  
• Gunfire Reborn (Xbox Series X|S, Xbox One, PC, & Xbox Cloud Gaming)
  
• SIGNALIS (Xbox Series X|S, Xbox One, PC, & Xbox Cloud Gaming)
  

Oct. 21

• Persona 5 Royal (Xbox Series X|S Optimized, Xbox One, PC, & Xbox Cloud Gaming)
  

An Xbox Series X can run 4 sessions of the Xbox one version compared to one of the series X version. so if you're attempting to play an Xbox one native game on the cloud, you will always have greater success simply because there are more slots available to you

Each and every cloud session has an Xbox series X on the other end

Everything on the cloud that has a Series X version is the Series X version

Cloud gaming behaves exactly like if the hardware was local. If your character is migrated it's available

Thanks for all the answers.

As two of you mentioned, cloud gaming is powered by Series X now, like I mentioned too.

I still have the same question. Isn't there also quality difference in graphics between Series S and Series X? Like textures are more detailed and shadows are rendered better in Series X? Now if Series X is used on cloud gaming, isn't those improvements then on Series S too via streaming from cloud? Or are the Series S and Series X exactly the same graphics wise in general but Series S just has lower resolution?

I understand that cloud gaming isn't 4K and there might be latency issues etc but that wasn't my question.

Thanks.