Microsoft doens't need to release a new console like SEGA 'had' to when the Saturns days were counted,
while the PS was still going strong
because gaming is just a small part of microsofts activities
while SEGA had to go multi-platform or release a new console
besides that, the xbox is doing much better than the Saturn did
BUT!
you know that MS released the 360 far WITHIN 4 years after the Xbox
a thing that hasn't happend the last 20 years
so in 2010 it will be even 5 years after the release of the 360
so you never know what they are planning
''Hadouken!''