PC isn't dead, PC HW market is slow, as once they buy a PC, most users are fine for a long time, but the existing user base is huge, and slowly growing too. PC power users is a much smaller niche, this is true, but games don't require those configs to run, otherwise they wouldn't run on consoles at all.
What could actually happen in PC market is a shift to cheaper Android machines for many home users, leaving x86 and Windows the leadership only in workplace PC's market (but many new companies without x86 and Windows legacy could switch to a cheaper platform too).
I too like to make arguments against things no one's said.
I should have expanded: as long as PC isn't dead in general, neither is dead as PC competitor. The reason why building a PC with equivalent specs to next gen consoles is so expensive is that AMD builds APUs with those specs only for consoles, PC APUS lack controllers for GDDR, so PC mobos too don't support GDDR onboard. This will delay the moment when a cheap PC will be competitive with next gen consoles to when it will be possible to build them either with faster APUs and fast enough DDR become cheaper or, better, with former mid-high-end discrete CPUs and GPUs become cheaper mid-range. Up until then affordable PC will be a competitor platform suitable for any gamer that needs to be a PC users for other purposes and finds its gaming performances enough, while full-specced gaming PCs will be niche competitors. But this doesn't make gaming PC dead, it just delays the moment it can become really competitive again, but its others uses and legacy and less power-hungry new games will keep it alive. On the games front, except for the most demanding AAA titles, devs, and even more publishers, will keep in mind the power of the average gaming PC, whatever it be, when deciding minimum and mid-settings HW requirements.
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