You are all forgetting a very important aspect of international production/sales.
Currency exchange rates. There have been and are LARGE fluctuations in the US-EU-JPN currencies in 2008/2009. Sony is at a disadvantage because of the Yen, Microsoft is not.
Microsoft has it's biggest market in the US where the currency rate of the dollar don't matter.
I suspect Microsoft pay for the parts of the 360 in dollars (probably Sony does this too).
Sony has it's biggest market in Europe and reports it's earnings in Yen.
With fluctuations up to 30-40% in 2008 this will affect potential profits VERY much.







