I think our biggest problem is simply that games aren't made for PC anymore. We don't have to build crazy rigs anymore to play the latest games at max settings. My rig is like 5 years old(?) and still plays every new game on ultra, and its not even a real crazy rig ether.
I remember back when the first crysis came out etc everyone was in a rush to build a rig that could play it maxed out. Those were the days when custom building was huge. These days you can just go get a prebuilt from X company for like $600 and play any and all the latest games for several years.
Bottom line is consoles are smoking the PC gaming / pc gaming market.
When you start adding in mods, games can become pretty demanding. Something like Skyrim can chug along with a bunch of texture mods added in, and even an older game like Morrowind, too. PCs have the benefit of mods right now, and so far just Fallout 4 will have them on consoles (XBO at least, PS4 eventually). You can even mod Crysis if you like and get it really looking sharp, but need some hefty hardware to run it.
RTS games are still the domain of the PC, but those mostly rely on a fast CPU than a hefty graphics card to be playable. You can always have a high-end card to play them with everything maxed, but it isn't a necessity. We'll have XCOM 2 before too long that is PC exclusive when the first games were also on console. PC suffered with the PS3 and 360, but with the PS4 and XBO running PC hardware (even if it's PC lite) it should bring some parity back. Right now we have to go with parity in the multiplatform releases and hope some special attention was paid to the PC. Sometimes those are ports and yes, sometimes those are done really poorly, like Batman: Arkham Knight. Plenty of others get a fantastic treatment, even if textures are a little low, but that's what mods are for, like this one for MGS V: TPP or even something like SweetFX to tweak the lighting and colors. Course there are always ENBs to make things look even better, if you can run it.
Games now are starting to require hefty hardware again, and not just in terms of hard drive size. Something like GTA V on PC requires some fairly strong hardware, especially if you're running it at 4K. Most games require strong hardware once you move past 1920x1080, actually, so running at 2560x1440, 2560x1600, or 4K will stress the hell out of most systems to the point a video card upgrade is a must. A 980 Ti or TITAN X is the ticket, but sometimes at 4K you need to SLI them. If you're on 1920x1080 you really just need the single fastest card you can afford, but at higher resolutions? Give it all the power you can get. Yes, most CPUs will still be fine, like how the 2500K is still pretty damn good, but higher resolutions demand more, particularly from the video card realm. If that's what it takes for us to find the limits of available hardware and push things to the brink again and again, I welcome the move to resolutions from Full HD to Ultra HD and beyond.