Microsoft has completely replaced the Xbox One S blade servers with the Xbox Series X variant.
Microsoft announced in the middle of the year that upgrades Xbox Cloud Gaming hardware, while now they talked about the The Verge that the planned work has been completed. This means that the Xbox One S blade servers have been replaced with a newly developed Xbox Series X variant, so the entire cloud-based service runs content on more modern hardware with higher performance.
The above step could be important in conquering the TV market, as Microsoft has already taken Xbox Cloud Gaming to many areas, but not to TVs, and the company is working on it today. There are still many question marks about how to do this, but on the server side there is a hardware base to even provide 4K streams.