The Witcher series has always been one renowned for it's graphical fidelity, but the problem here is that as a console owner you're going to get the kind of people that like to boast about how amazing their PC version is when it comes to graphics.
It's true that there is a ton more power in gaming PCs than there is in the Xbox 360 and PS3, but Witcher devs believe they'll be able to do something special with next generation consoles.
The Witcher 3: Wild Hunt will be very impressive on both the PS4 and the Xbox One if the Polish developers are to be trusted. Konrad Tomaszkiewicz, the game director of The Witcher 3: Wild Hunt has said, "We're creating a really big game for three major platforms at the same time - if something's a challenge it's that. Additionally, developing on next-gen consoles is always a process to look forward to - working to get the max out of the hardware and thinking how one can creatively use the technology is always a blast."
Perhaps those with the most powerful PCs will still be able to find a way to boast when Witcher 3 comes out, but there's no denying the fact that now with the additional hardware power of both the PS4 and the Xbox One, Witcher 3 will look amazing on the big TV.