If it's literally only a few percent i definitely would rather have more cores, eventually devs will use them making having less redundant. Honestly i feel the quad core mania over the last decade has allowed too much focus on graphical fidelity, when what people really experience from games is their interactions... which is pretty shockingly poor for how mature the scene is.
I want a deep learning intelligence to be the main driver of innovation this generation, utilising as many cores as feasible. So that every time you play a game it should be different the next time. It would make games like Dark Souls truly a marvel.
I'm really tired of gimmicky graphics that get used in a few games when the tech is ready to be PR blasted for sales before being forgotten about.
Alas this seems like it would require cloud connection like to azure or something to achieve, which is something i really dont like the idea of...