You know you can hook up your PC to a TV...right? It's the same damn connector.
I play many, many games on my living room 55inch 4k TV, and my PC isn't even in the same room.
(Stream through Shield TV and 1GB ethernet)
Seriously? I must not have been too clear on this. Of course you can hook up your full tower, 2080Ti, water cooled case in the middle of your living room, keyboard, mouse and XBox controller or maybe a Steam controller with some USB cables for that Corsair mechanical Keyboard, unless you find a good wireless gaming keyboard that will work 3m+ away and deal with Windows 10 on your TV set magnifying the icons and text so that you can even read them. Then make sure all the drivers and updates are constantly being updated. Besides I do have a HTPC hooked up to my TV set and know the ups and downs to this sort of configuration. I use a Wifi Logitech media keyboard and track pad -> useless for gaming (Steam controller and/or XBox 360 controller) but with Win 10 I need to have that damn keyboard to work with the OS effectively.Anything with an HDMI output "naturally" has this option and i'm not aware of any gaming GPU's that doesn't have at least 1 HDMI port.
Yes you can string cables but you fast approach limits with cable lengths with 4K, HDR and 120hz VRR TVs besides the holes you may have to do. The Shield??? Not too familiar with that, will that pass 120hz HDR, VRR or just 60hz HDR to the TV? And not degrade it?
Ethernet? -> Not only lag but how well does that work with 4K HDR 60hz+. People do stream but normally 1080p and not 4K unless things have changed.
Yes I could rebuild my HTPC, it has a 1700x with a Radeon Vega FE (for now) but most likely would have to spend more money then just buying a Console with better quality, unique games and less hassles. Now in reality my HTPC is virtually free so to speak -> It has pass down parts, I am a good recycler. It will get either the 1080 Ti or 5700 XT (most likely due to supporting FreeSync via HDMI 2.0B) sometime in the future which are not as fast as the next gen Consoles nor as capable, without HDMI 2.1 they will be limited on top end and even middle end TVs next year and following. Even a 2080 Ti would be limited due to not having HDMI 2.1.