Fiber internet was invented around the 80s. I only got fiber installed at my house a month ago. Most homes around here still have expensive low bandwidth cable. For cloud gaming to actually work you would need to upgrade the world's internet infrastructure to an incredible degree. This article highlights the issue (in the US, one of the most developed countries)

https://www.cnet.com/tech/services-and-software/streaming-video-barriers-broadband-inequities-and-the-digital-divide/