Originally I was going to use Mario 64 in the title, but then I wondered about Halo, and apparently it was also available at the launch of the Xbox, which I had no idea. Despite of the polarizing views the game can cause in gamers, there is no doubt that it changed the whole of video games forever. Same with Mario 64... but, yeah, I don't want to turn this into a debate between these two games.
I can't remember any games at the launch of the 7th gen consoles that really moved video games forward. Gears of War came out nearly a year after the 360's release, and Call of Duty 4 came out nearly a year after that. Even then the minor advances in both can hardly be compared to Mario 64 for setting the stage for 3D worlds and platforming, or with Halo for bringing FPS games to consoles in an accessible and addicting manner.
There don't seem to be any games being released with the 8th gen that are pushing new boundaries, either. Knack, which made me think of this, is easily a throwback to the Playstation 2 era games. Even in the future we have Watch Dogs, which seems like a natural progression from Assassin's Creed, and Titanfall, which could be argued to be Call of Duty with giant robots.
We done with the idea of hot new release titles that change things up? As a PC gamer I don't mind the idea of innovation being relegated to the PC and lower-budget titles, but you have to miss that "nothing will be the same" experience.