Heh, PS3 prices weren't so much unstable... they were just damn high and got higher. ^^; Still imported one on day one, mind.
No way 4m units will be "enough" for a worldwide launch, I wouldn't have thought, but I will still be interested to see exactly how much more it will cost to import one day one.
But yes, it is a little worrying how high DS game prices have slipped in Japan, combined with the exchange rate I'd never actually stopped to look at just how much more expensive than US games they have become.
What's the current best guess for US game prices? $40, maybe $5-10 more for really high profile releases? Which would be cheaper than even the cheapest Japanese games, I guess, unless the exchange rate does something awesome in the next couple of years.