My rig typically has 3-4 GPU's (Only a Radeon 5450 whilst I wait for Vega.), Core i7 3930K hex @ 4.8ghz and 64Gb Ram. - It's not portable, I tend to keep it confined in my games room.

The Xbox One sits in my lounge/living room.

I also have an Xbox 360 and Original Xbox out in the man cave with a few hundred games.

I will happily play a game like Overwatch on my PC whilst I am doing encodes, facebooking, email, work, development or looking at cat videos on Youtube.
Then, once I have had enough of all of that, I get up, wander into the lounge room, plonk down on the couch and again, fire up Overwatch on the Xbox One.

The platforms aren't competing for the same space in my home, even if the majority of the game library is shared. (To be fair the majority of the PS4's game library exists on the PC too these days. Hooray!)

And honestly, I don't care even if I buy the same game multiple times, it's worth it if I enjoy it.

And thus, I will buy Scorpio to replace my Xbox One. It will make a solid HTPC as well, ripe for all the transcoding.

My 4K TV is connected to an Nvidia Shield box, so even though my PC isn't even on the same floor as the living room tv, I can easily play all of my PC games, in 4K, on the living room tv on a wireless controller.

People LOVE to go on and on about PC not being viable because it's so much of a headache to play it on the living room tv, but that's nonsense in this day and age, for a start why is gaming on a PC monitor seen as bad to begin with? And as illustrated, if you really want to play your games on your main tv, there are hundreds of viable solutions that make it super easy, way easier than most people against the idea seem to believe.

Seems like you completely missed my point. Nobody said it was hard to play PC on a TV. Nobody said it's bad to play on a monitor. So we should all play like you, yes?