Not much. The fact of the matter is, once game developers adapted similar modern rendering engines that are PBR based and all use similar lighting, texture maps, etc., things became much less interesting but of course more efficient and more realistic.
What I expect from next gen is sharper resolutions and better frame rates and of course, gameplay for me is king. I don't care what games look like anymore, as long as I'm enjoying it that's all that really matters. Of course, there are people who want to push the boundaries of real time rendering in gaming to create more immersive realistic art, but I personally don't care much for it. If it's there, great! If not, also great! That's my approach to "better graphics".