I love it when engineers worth their salt actually do the back-of-the-envelope calculations for latency, etc.
Tangentially related, I remember years ago when Stadia and other cloud gaming products were being released doing such calculations and showing a buddy of mine that even in the best case scenario, you'd always have high enough input latency to make even casual multiplayer FPS games over cloud gaming services not feasible, or rather, comfortable, to play. Other slower-paced games might work, but nothing requiring serious twitch gameplay reaction times.
The same math holds up today because of a combination of fundamental limits and state of the art limits.
The calculations I was reading at the time suggested it would work for casual due to the gaming PC being very close to the game servers and running inside the best network available (googles).
Google also said that the controller would send the input straight to the server.
And a fast stadia server should have good fps combined with a little bit of brain prediction
Tangentially related, I remember years ago when Stadia and other cloud gaming products were being released doing such calculations and showing a buddy of mine that even in the best case scenario, you'd always have high enough input latency to make even casual multiplayer FPS games over cloud gaming services not feasible, or rather, comfortable, to play. Other slower-paced games might work, but nothing requiring serious twitch gameplay reaction times.
The same math holds up today because of a combination of fundamental limits and state of the art limits.