Infrastructure growth is something people just don't account with at all I think.
20 years ago there were only about 200m people on the Internet. Their speeds were ridiculously low, needing hours or days to download anything substantial, with video qualities and such being rather terrible. Even piracy wasn't exactly too viable: the bandwidth costs and the time investment, not to mention you having to unplug your phone for a long time, often meant you were often better off buying the product you're trying to illegally obtain. For most, Internet was also very expensive and not even necessarily available.
10 years ago, unlimited Internet consumption on your PCs was a given, and we were finally seeing good enough speeds to reliably stream in decent qualities, although few people had the privilege of HD playback just yet. We were already well into Internet on phones, and yet, in 2009 not that many people had smartphones yet. Internet on phones was expensive as fuck, with "packages" including 500Mb or 1Gb costing more than the unlimited plans today, and the speeds weren't good either. Browsing YouTube for more than a dozen videos per month was a bad idea.
Today we start getting 5G in more and more places. A huge percentage of the developed countries employs a very vast 4G network. Back to PCs, tons of people have 100mb, 200mb, 500mb, 1gb downloads. People comfortably watch HD streams (live streams, even) on their phones, without having to worry too much about data because you can get dozens of gigas or unlimited plans for 20-30 Euros. Some of the biggest entertainment services in the world like Spotify or Netflix work through streaming, not long ago they didn't even allow the option to download just yet.
Why is it so crazy to think that in 10 years the infrastructure will be there for BILLIONS of people to access low latency HD/4K streaming? Why is it so unreal to think that the BILLIONS of people already playing on their mobile phones will accept streaming as an option for their future gaming habits once the infrastructure is there? Why is it so absurd to think that gaming, an industry that's been growing at a crazy pace for many years now, will keep on increasing its potential? And most importantly, why do people think "real games don't fit on consoles" when titles like Fortnite, PUBG, COD Mobile, Asphalt 9 or FIFA already proved this can be wrong? Yeah, no shit you're not gonna play God of War 2018 as is on a 5 inch phone, good luck reading the texts, the UI or the subtle details of the world. But if streaming becomes a worldwide phenomenon, console/PC games that can also be streamed will obviously be designed around that world too. Mobile gaming already influenced traditional gaming (both for better and worse), you think cloud won't have any influence on game design?