The Odds?
Well I guess there will definately still be people playing with PS2 systems, even like 5 years after the PS3's been around (heck, some people even still play with their PS1's). PS3 being a High Definition biased system, not everybody's gonna give a crap about High Definition as people will still be using normal definition TV, and 2D games are still popular today.
PlayStation 2 has got like millions of games at it's disposal, not only the overrated Grand Theft Auto crap, but also it has some really interesting but underrated games that nobody's heard of, (Zone of the Enders anyone? Nobody heard of Oni? Klonoa?), it's got lots of Winnie the Pooh and other cartoon based games that the little tykes are gonna enjoy, the endless tie-ins of Football, WWF, Movies, TV Shows, Candy (
yes, Candy), and other stuff that keep comming and comming in should keep the PS2 around for a while. PS2 along with XBox and GameCube are overloaded with 2D games, Marvel VS Capcom, Capcom VS SNK, Alien Hominid, Disgaea, the list goes on, and I can't see why a developer would want to move onto the PS3 to make games that would look equally as good on the PS2, add all this with the millions of PS1 games around, and you've got like millions and billions and zillions and kajillions and brazillions and.. (you get the idea.
So I guess the PS2 will still live long, even though I would've preferred it to be the Dreamcast.
As for the Wii, well not everybody's gonna like it's control style of moving Mario and other characters by waving a remote about, some some people might want to go back to the old fashioned control pad.