PS3 was $600 at launch and Sony lost a good $200+ on each machine iirc...
Wouldn't it be more accurate to look at what the PS3 cost/was priced in Yen for an assessment? Not sure how the currency rates have changed between the launch of the PS3 and what the situation is compared to that now days - but I do know that only the US is that concerned about how much a console costs over the pre-historic launch price of $299. We in Europe have always payed a lot more for our consoles.
IMO - since the low entry price in the US is rather detrimental to the success of the console, I would calculate how much [in YEN for the Sony console] it cost for Sony back at the launch of the PS3 and try to cover the budget for the new console with current currency exchange-rates trends from that angle...