Um..
As I've been saying, it's time to stop focusing so much on graphics, we're just about to hit the ceiling on visuals. There's only so much you can do visually to make something look real.
And, I'll tell you right now, MGS4 looked great when it first game out. Today, it looks like garbage. MGS5 looks amazing. No pixelation, step-ladder effects going on, and the draw distance is amazing, along with detailing not looking flat.
In MGS4, you can see obvious pixelation in the floors and walls.
But, here's the thing.. How much is sound quality going to improve from this gen to next? How much did it improve before? How much are 2D games, like shank going to improve? Looks exactly like an adult swim cartoon. There is no more improvement to make on those fronts.
Starting this gen, we can cross off sound as being something to get better with each gen, because we've hit the ceiling with that. It's going to come down to how much money a developer wants to spend, and their graphical approach.
Next gen, we should see an end of in game pre-rendered cut-scenes. I imagine there would only be pre-renders for things like intros, endings, and credits. But, I doubt we'll get those in the middle of the game anymore.
So, stop worrying about graphics. You're not going to see a jump of 500,000-20,000,000 polygons as easily as you would 100-3000 polygons. There's other things to focus on.