I have both, and honestly, I couldn't live without one or the other.
I like to pay FPS games like CS and Overwatch on my PC.
PS4 on the other hand, have amazing exclusive games that are not available to the "PC master race" such as The Last of Us, Uncharted series and Horizon Zero Dawn.
So if you have the money, get both. If not, check out those PS4 exclusives I mentioned and if for some reason, they don't interest you, go build a PC. You can build a PC for the same cost of a console and beat the specs of a console.