I remember nerding out one day and reading a transcript of a Nintendo investor meeting that Iwata had with either the media or the board of directors (It was hard to determine). Anyways, whoever he is speaking to, they ask him a barrage of questions, which have little to do with the software side of things, but more so the business side of things. He talked about the theory of constraints and how Nintendo adher to it. For non-business majors, the Theory of Constraints was introduced in Eli Goldratt's landmark business novel "The Goal".
What is The Goal? "The Goal of any company is to make money." This sounds simple, but its a much deeper corporate strategy that requires all or almost all components of a business sound be profit producing. In the book this was illustrated by a manufacturing plant obsessed with cost accounting, which bought huge quantities of parts at a discount. This lowered the cost per part, but the company wasn't selling enough machines for it to matter.
That is part of a "Push" strategy, where you try to dictate what the market wants. The american auto industry has used a Push strategy for years, overmanufactering far past what the market needed. The opposite is Pull strategy, where you let the market dictate how much and what you want and produce to that. You try to have nothing left over or "zero inventory", and that is probably why Wiis have been constantly under supplied.
Anyways, the Xbox and Playstation were dreamed up by overzealous marketing executives. Any accountant worth his CPA would look at the break-even point of these machines and cringe. Third Party publishers should of recognized the statistical unlikelihood of profit in this climate. Watching the competition crush you in profitability, coupled with the collapse of acclaimed publishers and studios makes me believe that the next generational transition will be completely different and that the HD twins will follow Nintendo's lead in making consoles that can flourish being something else besides a "loss leader".
I hope that this is the case, because this happened wayyyy back in the auto industry, when a Japanese vehicle was synonymous with shoddy quality. Toyota's Taichi Ohno developed the Pull strategy, and American automakers have been left in the dust because of stubbornness, ego or both. I think we are through, at least for the next decade, with what Sony exemplifies this generation: extremely expensive consoles and towering dev costs.
I believe that in the end, more lessons will be learned from Sony's failure than Nintendo's success.