Although I think Wii will have a long life, I think that Nintendo will have to release a more powerful and HD console before Wii is 10 years old. Sony showed that coexistence of old and new console is possible, Nintendo, now that Wii's success will force it to increase productivity even more than now, will be able to afford producing and selling two different home consoles, gradually switching plants as the newer grows and the older fades away.