Sony keep losing money on their hardware, you know, it's in their report (loss even increased this quarter)
They still using profits from software to boost installbase
It's just economics and situation in electronics, both in general (MLiD) in current moment, making it unsuatable to make a permanent cut in price
Sony up YoY on profit
It means their strategy of increasing installbase in most important quarter for that is clearly working
They sacrifice on some margin in Q4 to move more units, that in turn bring them more profits on long-term horizon
Nintendo have different business model - it's a model for selling toys and those are not really discounted at shopping season, because toys are bought anyway in holiday season and sacrificing profit is unwise
It kinda clear when you look at profits - Sony has roughly even profits across quarters, in Q4 they sacrifice margin to increase profits, but in absolute numbers it was roughly the same as in Q3 (~1bn). Nintendo profit massively from holidays, they have the same 1bn in profits, but in non-holiday quarters it much lower - they earned same 1bn in profits for previous 2 quarters, launch included. And next quarter it will be ~3 times less than profit of Sony.