Sony made gaming cool.

[S.T.A.G.E.]

F0X said:

S.T.A.G.E. said:

Sega and arcade gaming was the "niche" cool gaming. When Sony came gaming became cool for adults and teenagers. It was no longer a toy for children.

Pah. You pretty much said Sony made gaming "mainstream". Nothing mainstream could ever be cool.

[/sarcasm] 

You would be surprised. Sega would've been the one to do it if Nintendo didn't hold back third parties from them. At some point it no longer mattered for Sega, their fate was sealed. Especially when, "Sega does what Nintendon't".