My guess is 360's US sales settle in at ~10% up YoY through to the launch of Kinect. EMEAA Sales will settlle in at 2-5% up YoY. Japan sales will settle in at a few % down YoY. Overall weekly WW sales will be up 5-8% YoY through to Kinect launch.
What happens then can only be predicted if you have inside knowledge on Kinect pricing / bundling and 360 pricing strategies.
I think Wii will be cut in price again this year, another $50. Nintendo can afford to do it and still make a profit.
I dunno about PS3 though. If they want to keep sales momentum going in all regions (and Americas is important, they can't just ignore) then they will need to do something about price / perceived value. or they will lose a lot of momentum, and Move is not going to drive any momentum.
Wii is still the console of choice for people who are first time 7th gen console buyers who specifically want motion control. And it will remain the cheapest way to get into motion control gaming this holiday season.
Wii is in a steady position. 360 is [now] in a solid position. PS3 is in an uncertain position.
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