Nintendo once had a name (actually two: Nintedo, Gameboy) that was synonomous with gaming. Yes, it meant that they were leaders, but easily replaced. Sony doesn't make any money if your frieds call their cheaper, virtually interchangable 360s Playstations. I think it unlikely that many people call anything but a Wii a Wii or anything but a DS a DS. Maybe Playstation is recognized, but Wii cannot.be confused, substituted or forgotten.
"You can never jump away from Conclusions. Getting back is not so easy. That's why we're so terribly crowded here."
Canby - The Phantom Tollbooth