I feel that it's not possible to have made generational leap. Going from SD to HD is a major leap (go back and play a PS2 game to see the diff!) Going from HD to better HD isn't as big of a visual leap.
There will be graphical improvements, without question, as far as shaders and particles go. Yet, it won't have that WOW factor when you first played a PS3 game.
It's not Sony's fault, it's not anyone's fault. It's just the glass ceiling we've hit due to resolution standards in TVs. We won't see a big jump again until 4K becomes the norm in a decade or so.
The Carnival of Shadows - Folk Punk from Asbury Park, New Jersey
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