Why is "Nintendo" used as a qualifier for games?

[generic-user-1]

Clyde32 said:

generic-user-1 said:
i dont realy like nintendo games, the typical artstyle is just meh. and the music sucked on every nintendo console.
sega looks just so much better and the soundchips are much more fancy

You know, I'm not even sure if you are serious right now.

i was a segaboy till they died.  we had a cold console war in the family, my brother was nintendofan... wasnt easy after the DC...