So...
Have we agreed that PC beats PS4, but to get a noticeable difference it isn't particularly cost-effective? That seems like the obvious answer to me and it has been from the first post.
If you want games to look good, then getting a home console is most cost-effective. But if you really want to push the envelope to the limit to make the games look as good as possible, then you'll have to splash out somewhat more for a PC.