PC gaming remained static for so long because the seventh console generation dragged on for so long. A lot of games are ports. Things are about to take a big leap though. Hop into the PC board and check out the minimum specs for Witcher 3.
Minimum CPU: Phenom II X4 960/i5-2500K
Minimum GPU: Radeon HD 7870/GTX 600
Minimum RAM: 6 GB
None of those are outrageous. The CPUs are a couple of generations old. The GPU options are reasonably cheap, as the 660 is about $170, and the 7870 is just an older version of the 270X, which gets as low as $160 (but is mostly $180-200). The RAM's a bit high, but most everyone has 8 GB or more now, so it shouldn't be tough for folks to manage.
In fact, I think that the worst thing some unprepared people are going to be shocked by is the HDD space these games are needing.
The Witcher 3 needs 40 GB of space, and it's hardly the first newer title to ask for this much or more. I'm still sitting on a 640-GB internal HDD myself, but I get most of my games on my One. However, THAT thing only has a 500-GB HDD, and with
Halo taking up more than 60 GB after the patches, we're in for some serious drive issues. Microsoft really was short-sighted with the One with the drive size.