I think this has been the weakest generation I can remember. The games so far for the 360 and PS3 aren't even in the same level gameplay-wise as what we've seen in the previous generation. Mass effect is worse than KOTOR. GTA IV is not the best GTA, most shooters seem to have devolved instead of evolve. We get less, but prettier.
The Wii has a few signature games so far, but the library as a whole is not really an improvement over previous generations. Galaxy is great, but is Mario Kart really any better? or Smash Bros?
The only genre that I think has evolved significantly is the music genre. Rock Band's world tour mode beats the pants out of Guitar Hero II, but I'm sure that we could have gotten the same results out of old Xbox tech.
What can I say, almost every big title in the last 2 years has disappointed me







