While it is true that it would help PS3 sales for Sony to drop the price, as shown in the below charts, in terms of Yen which Sony reports in, there is already been an implied price drop.

Due to the currency exchange rates, Sony brings in 20% less in Yen from a US sale of a PS3, and 25% less in Yen from a European sales of a PS3.  Needless to say, those are big drops and even if you as the consumer don't see them, Sony as the corporation, does.

Yen/Dollar

http://finance.yahoo.com/currency/convert?from=USD&to=JPY&amt=1&t=1y

Yen/Euro

http://finance.yahoo.com/currency/convert?amt=1&from=EUR&to=JPY&submit=Convert

But, the more economically minded of you might say, if the Yen has risen against the currencies where the PS3 is built (such as the Chinese Yuan), it could balance back out.  Unfortunately, while the Yen is up against the Yuan, it is only about 7%.  Meaning that while 107 PS3 can be built now for the same cost in Yen as 100 PS3 last year, those 107 PS3 revenues will be 20-25% lower than last year.

http://finance.yahoo.com/currency/convert?from=CNY&to=JPY&amt=1&t=1y   (was 15 Yen to buy 1 Yuan, now only 14 Yen)

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