When we finally get to the point of realism in graphics from all consoles, probably by the end of this gen or next gen, what are gaming companies going to have to do to attract it's customers to make them buy their product? Graphics is no longer a selling feature what do they bring?

Tits and gameplay

Dicks and Gameplay.

How many licks does it take to get to the center of that game design

New experiences like VR, a wealth of new and returning content, and affordable game streaming.

When we reach the point of photorealism, I think non-realistic artsy rendering techniques will make a comeback, like cel-shaded games or blocky retro styled games. Think minecraft, wind waker, borderlands, the witness, no man's sky etc, but with more cool particle/lighting/whatever effects

We will all get cybernetic enhancements that allow us to see in higher definition than normally possible.

VR

Story and gameplay.

You forget about realism and create awesome unique and fun games like this one: