The graphics on the base PS4 are not good - I opened up Witcher 3 to compare, and it's apparent what a regression this is from their former masterpiece. Sharing the same disappointment a lot of CD project red fans are expressing. Not just disappointment on a half-baked product (riddled with bugs) that took 8 years to develop, but also towards CD project red's diceptivness on portraying what was supposed to be the best game of this generation console. I'd recommend saving your money for the PS5 version (and wait for the review before buying).
Update: giving it one star, I can't even get past the first mission after the prologue, bug keeps crashing the PS4 during the mission briefing, it's unplayable at this point. Just shameful what CDPR released.