The problem with the 2008 scenario is that the developers are all hopping resources on the wii bandwagon, I think we may see a bigger variety of software in 2008 come out for Wii than we see for either 360 or PS3. Think, in the last 3 months of this year alone how many developers have announced wii projects? If current sales continue, we may start hearing of developers even considering canceling current PS3 projects in favor of the Wii, simply because of the lower requirements and significantly larger (and fastest growing) install base.
Nobody is crazy enough to accuse me of being sane.