You talk as if 20 years from now internet speeds will be stuck at the same rates as today. In the next 10-20 years the leap in speeds will be huge, just like the leap we saw from 1998-2018 period. This is not something that will happen overnight, but it will certainly grow and solidify in the next 2 decades.
No because: But input lag & ping isnt related to internet speeds (how fast you download or upload). Its bound by laws of physics.... signals take take certain amount of time to travel x distance, and when its streamed and has to go both ways it just takes twice as long. Which means the experiance is never as good as owning the physical hardware, and haveing it done locally.
Maybe the concept Microsoft has with the hardware doing half the work, is able to close that margin enough where it doesnt matter though. That and haveing tons and tons of server farms everywhere, so no matter where in the world you are, your right next to one, you can log onto.
I can see it takeing off amoung casuals but it ll never be the best experiance (imo). Then again, maybe that isnt needed, for it to be successfull.
this is what input lag looks like (the downside to streaming games): (you press a button on your controller, and it takes sometime before anything happends on the screen) https://www.youtube.com/watch?v=RPG5PTT2ztw
"the latency is slightly noticeable, its not like your gonna smack your mouse and wait 3secounds before it responces, but its probably about half a secound at worst"
^ quote from video.
Also theres image quality loss, like watching a youtube video of a game, instead of actually haveing it on your tv. Owning your own console that plays the game, is a vastly better experiance for games than streaming them.
I believe it is a matter of stream technology improvement and infrastructure availability such as server location. Gaming via stream still has a long way to go in order to mature, but I believe it will become something very banal/common in 10-20 years, just like music/movie stream has become common today.
