ChristophWr: Pc gaming will always be prefered by serious gamer no worries.
This was true years ago. Not anymore. At the school I work at, the vast majority of kids play video games on consoles, phones and tablets, and when I engage a conversation about their gaming hobby, they sure spend a lot of hours playing. I personally can't stand tablets (nothing beats the keyboard/mouse combo), I don't care for the games they play either, but those kids are just as "serious gamers" as we are.
People have to understand that nowadays, kids don't use PCs anymore at school, they use either laptops or tablets. Unlike us, PCs are not part of their lives, they don't grow up using them like we did, therefore, they have no reason to own one at home.
I sure hope that PC gaming will still be around in 20 years, but I don't think it will be even close to dominate the gaming world.