Playstation line- I expect that brand recognition ('cause lets face it any Xbox fans here.. This generation's incarnation is and was a DAMN GOOD showing) will propel this line along for at least another console generation or two (if the evil bastards at Microsoft haven't managed to implement Palladium and different programs and have us all under thier direct control) even if the hardware itself is inferior, which I seriously doubt it will be, even if Microsoft sits back and slaps together a console with the latest tech 18 months later like they did this time. They will maintain a lot of developer support and stay the key player in the industry. WoO! there.
Xbox- Though it's a good console, and has some good games working for it, I think that as the general public gradually learns about some of the stuff M$ is planning it's gonna be losing ALL support. Heh. Maybe Microsoft'll just turn into a video gaming company. The Xbox has a comparatively small (but unfortunately rabid) following when put side-by-side with the PS2.. but I believe that some of those, if not the majority, simply look for the best hardware availiable, without any console loyalty.
Nintendo/Gamecube- ..I might be wrong but I think Nintendo's president said that the GCN was going to be Ninty's last console, and that they were gonna go 3rd party. *shrugs*
Anyway. You may commence flaming........................................... ............................................. now.