This is kind of it for me. My laptop is perfectly capable of playing a lot of games but I never feel like it's worth the effort. I play 2D games on it a lot, I have Steam and Origin, but it's not my primary game system. It has very specfic uses, mostly anything like RTS or Rollercoaster Tycoon and the like. I literally cannot use a keyboard and mouse for FPS, it just feels weird but not all games support controllers.
PC gaming isn't for me and the same would be true of a lot of people.
The enthusiast market will always talk of 4k at 120fps or whatever, but that's not the entire PC market, the larger market playing games on PC are probably running at sub-console resolutions and framerates or playing the "casual" games. PC is a wide term and not everyone buys into the enthusiast rhetoric.
This + exclusives.
I have a PC for Homeworld & Dayz...and anything else that's exclusive that I fancy playing (not much)