Does you wife hate you when she simply wants to watch tv :)
How do you get the sound from XBox One and PS4 on your amp?
ARC channel and optical out are all limited afaik. (my 1080p tv only returns stereo as audio out, useless)

My spaghetti setup in the livingroom is
Yamaha RX-V473 (stop gap receiver until I find a good hdmi 2.0a receiver, this one can't quite deliver full power to my speakers)
HDPVR (cable receiver), PS3, PS4, WiiU connected by HDMI via receiver on HDMI 1 on tv
PS2 connected with component video and optical audio via receiver on component 1 on tv (receiver doesn't convert component to hdmi)
DVD player connected with component video and coaxial digital audio via receiver on component 1 on tv
LaserDisc player connected with S-VHS and optical audio via receiver upscaled to hdmi (LaserDisc player is broken however)

I've got another color coded hdmi cable in the av unit, direct connection to HDMI 2 on tv in case I want to play ps4 while listening to another hdmi source. Stupid receiver can only mix audio of non HDMI sources with a HDMI source, no direct HDMI audio swapping. But as a slight advantage I still get the game sound over tv speakers while listening to my music without needing spotify.

Together with the cable mess of 5 speakers, and a subwoofer which has it own voltage upconverter (sub runs on 220v), ps eye, ps4 cam, wii U sensor bar (for Wii compatibility), wii U cradle, iPod, Controller charge cables, power cables, extension cords, it's an epic mess behind the av cabinet.

1st world problems!

(oh forgot the coaxial cable to tv for Intellivision 2)

that looks extremley lame to do everytime, you actually need something like this which duplicates the signal

https://www.amazon.de/CSL-Splitter-Verteiler-vergoldete-Metallgehäuse/dp/B01615JA3A/ref=sr_1_1?s=ce-de&ie=UTF8&qid=1478315430&sr=1-1&keywords=HDMI+4k+verteiler

I love it!

And no, that's just the game room. The living room only has an Xbox 360 and and Xbox One and another Sony amp. I finally disconnected the Ouya and PSTV since they weren't really getting used...BUT on November 10th, a PS4 is going to mysteriously appear in the living room. She won't suspect a thing!

*edit* I get the sound to the amp by running the consoles into the TV and using an optical audio cable from the TV to the amp. Basically, if it's on screen and I select TV, I'm good. Only problem is sometimes the audio and video are slightly out of sync depending on which settings i use.

I've already got a couple of splitters. One for my two gaming setups. The issue arrives when it comes to finding an affordable spiltter that still supports HDR. I'm sure they'll come down in price soon, though.

There are several problems with that, first a HDR compatible splitter is $160 or more. That one only supports 4K at 30fps
https://www.pulse-eight.com/p/177/1x2-hdmi-20a-hdmi-20b-splitter-with-hdcp-22-support

Plus according to avs forum, a splitter will conform to the lowest common denominator of the connected devices
http://www.avsforum.com/forum/143-general-gaming-help/1452009-input-lag-receivers.html#post24242866
But that may be circumvented by simply turning off the power to the processing unit. When it's on it will inform the splitter it can only do hdmi 1.4, which will tell your ps4 to switch down to 1.4. You actually need an image duplicator, as found on higher end receivers with dual hdmi out, so each stream can run with its own settings. So for $163 you still need to unplug the power to the processing unit to get 4K HDR on the tv :/

I don't want to use switches for all my consoles.  That would mean buying multiple of the same cables, and possible added screen lag..  No thanks, lol.

But, here is my current set-up

HDTV, which is used for WEB BROWSING only.  34ms screen delay is rediculous. My 1ms G2G has 9MS delay.

Computer

Which is linked to a main HDMI hub (external) via the internal Capture card to my consoles.

I have two usb hubs that I do not use together.  One has a scart input to HDMI, and the other is an HDMI splitter which gets around the PS3 and PS4's HDCP.

PS3 and PS4 and PSTV use the same HDMI and eithernet cables.

However, as for all of my old consoles,

Sega Genesis, Sega Saturn, Sega Dreamcast, PS1, PS2, JPNPS2, some of them remain plugged in.  The genesis doesn't, because the brick is always drawing power.. The sega dreamcast, PS1, PS2, and sega saturn all use the same power cord. The Japanese PS2 doesn't.  Eventhough I only use fat PS2 models they decided to go with a different power cord in Japan.  Everything is plugged into an 8 socket heavy duty surge protector.

the scart to HDMI goes to my capture card, the capture card's HDMI is going into my gaming monitor.  Which is set up as monitor 1 of 3, which means, I have to make sure to move all my stuff over to monitor 2 if i wanna see it while gaming.Monitor 3, is use mainly for screen captured special effects.

But, yeah, I can't just turn on a console and start gaming. Did I mention I must have my computer turned on to power the capture card or else I wont get a video signal to begin with?  

TL;DR

So basically, unless I'm going to play the currently connected console, I have to probably unplug something, switch the converter box, switch the video cable and plug in the console I want to play while having my computer on.

The only possible solution is to buy 2 PS4 Pros. Sony is smart by doing this. Knowing how people are lazy to disconnect cables to get benefits. Either that or they know VR isn't here to stay and will eventually be taken out of the loop. Or make it even more tempting to buy an upgraded model that has proper passthrough. What is it Sony? What is it?! Maybe HDR was an afterthought after Xbone made it a big deal? So it wasn't even designed with that in thought.

Reminds me of my setup to run DreamCast games on my old CRT projector. For some reason the signal level from the DC was incompatible with my projector. So I had the DreamCast feed into a capture card in my PC through composite video, which scaled the image up to 800x600, then put it back out as S-VHS to my S-VHS video recorder and on to the input box of the projector. Analog sound going to PC as well, through the Sound blaster AWE64 Gold edition audio mixer, to continue as optical audio to my amp. And analog audio from the Amp connected to the S-VHS for recording. (Sound combined with CD music coming from my LaserDisc player)

Had lots of fun playing crazy taxi on 72" while listening to The Prodigy :)

It's probably the same nickel and diming as leaving out the 4K UHD player. HDMI 2.0 ports are a bit more expensive, almost twice as fast, different protocol, different DRM perhaps additional license fees. The XBox One S only has 1 hdmi 2.0 port. The hdmi in port is still 1.4, it doesn't support 4K pass through either. http://windowsreport.com/xbox-one-s-support-4k-pass-through/

Considering a HDMI 2.0a signal splitter is $160, while 1.4 splitters are sub $20, I'm guessing the new ports, especially the receiving end, require a bit more grunt than your average 1.4 port.