The 360 almost certainly peaked in 2008 unless theres a huge price drop this year.
It really has the same kind of demand and market of the original Xbox and really doesn't seem to have much to reach beyond that. Natal seems like a sort of beefed up eye toy and not much more "market extending" than that was (which is to say marginally extending). When I see some of the games Sega and others are making they practically scream eyetoy to me compared to move/wii stuff.
I would guess a bit under 10 million 360, 17 million Wii and around 13-15 million PS3.
It's pretty hard to see things changing based on a survival horror game and another Halo as the only big exclusives. Everyone who wants to be a space marine bought a 360 a LONG time ago.
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