ah, nostalgia blinders i see.
http://kotaku.com/the-ps3-had-12-games-at-launch-heres-what-they-looked-513396910
i'd say other than N64 this is actually the largest jump in visuals at launch.
I think he meant more from the end of one generation to the start of the next. I mean, part of that MASSIVE leap from the start of the PS3 to the PS4 is that you were talking about 4-5 years for most generations, but you had this most-recent one last 6-8 years (depending on which console you're talking about). That, and since we're actually at a point where graphics have SOME level of realism to them (as opposed to everything being blocky before, if not 2-D), graphical improvements matter now. We expect realism now, so we put more weight into the visual quality of games.