Microsoft's ONLY contribution to gaming, was being a trailblazer of online features on consoles in the 00's.
For Sony it was probably their disk media that even their direct competitors used and use.
For Nintendo, that's a hard one. It could be saving gaming in the US from the 83 crash, it could be for things we take for granted today like the Dpad, or the analog stick. I want to say the best was the SNES controller, as it was so good that it became the blueprint of the standard game controller we all know and love.







