For me, that's what I look for in graphics. Graphics should reflect the real world and point out the more 'taken for granted' things with a wow effect.
For example, uncharted 2 was quite simple but everything they drew or kept on the screen made sense and could be seen even during an intense battle. From U3, in the bar, you could tell what was on the wall and in the washroom and how everything broke and moved.
Being crystal clear and sharp is nice but doesn't impress for long like the witcher 2; very high level of detail and texture quality from the grass coloring to the face freckles. It's nice but you can't see it all the time.
Therefore I haven't seen that leap on any system be it ps3 or pc or whatever. I have seen something like it from watchdogs where the water reflections and dusty roads really bring out the environment.
Also, originality. When I saw metro last light, wasn't impressed much. It's the same all quality and effects and focus on hq clothing for army personnel. But when I see something like assassin's creed, I see how everything is moving and its a live city. From the animals to the people to the beautiful beautiful weather.
Then again, everyone has a different angle on graphics.