While going though my collectors editions making sure I got everything and if there was any bonus DLC I noticed on God Wars: Future Past on the back there was an icon with the other icons which tell you how many players are supported, HDD Space, Remote Play being available. this icon said PS4 PRO ENHANCED
checking some of my other games Nier: Automata has this icon but Gravity Rush 2 doesn't and Nier: Automata was release just a bit over a month after Gravity Rush. (Nier = February 23, 2017, Gravity Rush 2 = January 18, 2017)
Now while I could assume this would mean that Nier: Automata needs the PS4 Pro Enhanced to play but I know this is wrong as my PS4 is the first generation model and Nier: Automata plays perfectly fine.
So what does it mean when a PS4 game says PS4 PRO ENHANCED on the cover?