As of 2018, console gaming accounts for 38% of the overall gaming market, while PC's account for 33%, with many of the PC's biggest earning games being eSports, F2P mmo's, etc. The article you posted is proof itself, stating that eSports will generate over 1bn dollars this year, and will vastly rise over the next 3 years. Esports is not necessarily just about the % of people playing, but the viewers, advertisers, sponsorships, events, people watching online through Twitch, etc. Even the hardware manufacturers, like AMD, nVidia, Intel, are all heavily involved, marketing and producing hardware for the eSports industry and for the next generation of more graphically demanding eSports games, like PUBG, Apex Legends, etc.
I'm not saying streaming services won't try to go after the PC market, it's just that they won't be very successful. The PC is a very different platform to consoles; it's a personal and open platform and PC gamers expect to have more access over their games through mods, user generated content, etc, that they wouldn't get through streaming.
Console gamers aren't aware or privy to the level of freedom PC players have, so they're more likely to be acceptive of streaming, as they're already used to consoles, which are restrictive closed platform devices.
PC's are needed to perform tasks outside of gaming, much of which people find too sensitive to be done through streaming. Powerful CPU's and GPU's aren't solely produced for gaming, but for graphics development, rendering, high level VR and much more. I believe even in a cloud computing driven future, companies like AMD, Intel, nVidia, etc, are always going to produce silicon for use in personal consumer computing devices.
But we'll have to wait and see; I don't think streaming will replace anything in the short term future, and will just be an option. In the long term future, if Internet becomes a ubiquitous entity, then yes, maybe we'll all be streaming almost everything to cheap little devices and all computing will be server-based.
But I think people will always want a personal device, that's closed off from networks and prying eyes, whether it be to produce sensitive PC work on or to play games on. And that's why I think native physical PC's - in what ever form factor they take in the future - will always continue to exist. Consoles, like I said, they're largely just for playing games on, you're not using them for much than that, and I think in 20 or so years from now, PlayStation will essentially just be like a Netflix app, there won't be any hardware but the controller involved. But yeah, only time will tell; it's kinda pointless debating further.