In fact I will elaborate a bit more.
1985-1995: NES and SNES, Genesis and Genesis, Gameboy and other small handhelds, Platformers, 2d
1995-2005: PS1 and PS2, N64 and Gamecube, Saturn and Dreamcast, Gameboy color and advance JRPG, 3d
2005-2015: 360 and Xbox 1. PS3 and PS4, Wii and Wii U, DS and 3DS, PSP and Vita, Motion gaming, gimmick, online, DLC
PS2 is more similar to PS1 then PS3 imo and all the other comparisons etc. etc. DS is more similar to 3DS then gameboy etc.
So that is why I say 1995-2005 :). The generations are too different in the traditional splitting of decades.







