So people actually count the Atari and Coleco crap pre-1985, even though none (most) of us were even alive?
Okay, that makes so much sense. Let's count "generations" that tanked the videogame industry. In short, here's a comprehensive guide to the real game generations:
GEN 1 - NES, Master System
GEN 2 - SNES, Genesis, TurboGrafx-16
GEN 3 - N64, Saturn, PlayStation
GEN 4 - Dreamcast, PS2, GameCube, Xbox
GEN 5 - HD/Motion whatever systems that are indecernable from each other because they do the exact same things and all people do is bitch, whine, and moan about graphics.
GEN 6 - N6, PS4, Xbox 3