Last Gen > This Gen?

Ideas of gameplay transcend generation gaps as our understanding of gameplay progressively improves, but there is an argument out there that the current generation of console's graphics don't look much better than the last generation's later games. This comes from the fact that some people believe that this generation's graphics are just in a higher resolution than the last generation's. And that if it wasn't for the increased output resolution then this generation wouldn't look much different from the last, and I see their point after playing a few current gen games on an old CRT. But that was until I watched this video of the GTA IV trailer rendered in GTA San Andrea's graphics engine:



And the same trailer in GTA IV's engine:



After watching theses two videos back to back I was actually surprised on the leap that has been made since last gen. One that looks just as significant as the leap from the N64 to GC or PS1 to PS2.