PS3 will be a distant 3rd in Americas, 360 will be all but invisible in Japan. In both cases 1st and 2nd position will be close. Americas being the bigger market will mean PS3 well behind when adding together these 2 markets. Wii will be ahead because it will be the only console performing strongly in both markets. Bringing in the EMEAA regions I think Wii will have it over PS3 and 360 will be a close 3rd, with UK supporting 360 in a big way.
Putting it all together makes Wii still the #1 console for 2011 (will probably be in 2nd place going in to the holidays) and 360 in 2nd because the massive gap between it and PS3 in Americas won't be overcome by the combined EMEAA Japan difference.
Even with all 3 systems getting a price cut (Sony will cut PS3 price by exactly the same amount as MS cuts its 250Gig sku) the order should remain the same. Price cuts can bring peak years to both 360 and PS3. A price cut could see Wii sell along 2009 lines, or at least hold steady and sell similar to 2010.
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