I feel like I must help clarify some things in regards to GPU power and frames processing as to my own understanding. It's basic mind you, but it gets the point across.
Currently when looking for an upgrade to gpu for a PC, a gamer will look at various websites and tech forums that show actual data on bench marks for the capabilities of a given gpu vs others on the market. The way this is done is a PC is built and tested with various games which the exact same hardware i.e. RAM and CPU, while changing out only one single component: the GPU
Please note the soul delineating factor and point of emphasis in these tests is one number: the fps, or frames per second.
The question then comes, well if the CPU stayed the same, why did the fps change so much? Well my friends, it seems gpu power actually has a great deal to do with how high you fps can reach.
Doubling the gpu power of the ps4 is going to make s bigger difference across the board graphics and fps wise than most realize.
This is an old example, but gets the point across: