Wii and Ps3 going at it for a decade. 360 too? How will the sales go?

[Slimebeast]

None of them will have 10 years lifetime.

X360 I think 7.5 or 8 years.
Wii 8 years
PS3 8 years

 Oh yeah, and total lifetime sales:

X360: 50 million

Wii: 140-180 million

Ps3: 70 million