Even streaming film and tv isn't "there" to the point where enthusiasts still get physical, just imagine how much time it'll take to get there for the gaming landscape where we argue about 2-5 FPS drops between platforms. Stadia is also such a flop it's hard to see where your optimism comes from, I can see streaming being "big" for some people who normally aren't into gaming but like many other things it won't be the future, just like VR has so far proven over and over to not be the future despite everyone claiming it will be.