I think this is where I just tap out on this discussion... "These changes are dramatically different, you just can't notice them as much.." A lot of people, even enthusiasts like me, throw up our hands and say.. well, if we can't notice the changes, is it really that much of a jump? Technologically speaking, sure it is, there are huge achievements being made, but.. maybe it's my age, I have a tougher time reconciling those advancements. And also, I look at a lot of the scenes and gifs people are posting in this thread and say "well, those look great, but is the player actually doing anything in that scene?" (particularly the Gif from Killzone or BF of those explosions taken from the helicopter).
It also happens to me when we start talking about the number of gigaflops some console pushes, or some level of AA versus another type of AA, tesselation, and things. I'm an enthusiast, but those sorts of details don't strike me as much. Although, I'm also the kind of guy who looks at GTAV and says "shit, this game looks incredible.." while a bunch of people on Gaf also looked at the same game and said "This looks horrible."