I had an idea to try to remember all the definitive dates where there was a change in the console industry wars and one console took the lead. Below are some I could recall... Anyone else remember some I may have forgotten?
EDIT: Revised list with some ideas lsited below...
November 19, 2006 (World) - Wii launches with first ever motion sensing controller which helps it sell faster than any previous system in history.
Mar-2006 (Worldwide) - Sony has shippied 103.69 million PS2's passing the landmark set by PS1 at 102.49 million making PS2 the most produced and highest selling console of all time.
June 10, 2006 (US) - DS Lite launched...helping it leave PSP in the dust and putting it on pace to become the highest selling handheld console of all time.
March 4, 2000 (JP) - NA October 26, 2000 (US) - November 24, 2000 (EU) - PS2 launches with first ever DVD player integrated in a videogame console, sets the standard and dominates that entire generation.
Feb 1, 1997 (Japan) - Final Fantasy 7 is launched in Japan...helping PS1 start to outsell the Sega Saturn in that region.
November 25, 1994 (US) - Donkey Kong Country is launched for Snes helping Snes win that holiday season and eventually the 16 bit war.
June 23, 1991 (worldwide) - Sonic the Hedgehog is released for the Genesis. It added the element of speed to the standard platform formula, introduced other unique elements such as the loops, springboards, high-speed devices, and the rings now permanently associated with the game series. The game was both a critical and commercial success and it helped Genesis compete with the Snes for 4 years which was previously unimaginable.
October 18, 1985(US) - NES is launched in US and it sells like hotcakes, helping revitalize the US video game industry following the video game crash of 1983.
October 18, 1985 (US, Japan)- Super Mario Bros is released. and it featured gameplay that changed the way video games were created. It is the first console original in this genre to feature smooth-scrolling levels, which made it a landmark in home video-gaming.
October 1977 (US) - Atari 2600 is released and it becomes the first widely popular microprocessor based console with cartridges containing game code, replacing the standard of having non-microprocessor dedicated hardware with all games built in.









