QUINTIX said:
I never understood the whole PAL (50fps)/NTSC (60fps) nonsense.
Mains current in the US is 60 Hz. Europe's is 50Hz. Both these frequencies are very tightly regulated so that wall clocks will keep accurate time. So it made some sense to make it a fundamental time base for televisions.
Also, once upon a time, having mutually incompatible television standards was seen as advantageous to certain governments, so that their citizens couldn't tune in to any damned thing, but only those signals that conformed to (and whose broadcasters were regulated by) the government standards. Hence, the gratuitous differences, even throughout Europe. (One very old joke is that SECAM is the French word for PAL.)
Sync-to-anything computer monitors are very recent developments, comparatively speaking, only appearing in the late 1980's - early 1990's. They were more complicated, and hence five times more expensive, than an ordinary television which only needed to sync to one signal type. It's only in the last eight years or so that "televisions" and "computer monitors" have become so similar electrically that manufacturing convergence has taken place.
Also, there is the whole sticky issue of films being shot at 24fps ever since sound has been added to film. 24 does not divide into 50 or 60 evenly.
Motion pictures are over 100 years old at this point, predating residential electricity for most people. And even at that time, electricity wasn't standardized. Thomas Edison was supplying DC current to New York, whereas Westinghouse was supplying AC current. And not even mechanical television existed yet...
Even my cheap 17" 1440x900 LCD panel lets me set the refresh rate to 75hz. C'mon, What's wrong with a little flexibility!?
Because Nintendo -- and by extension the software developer -- has to assume that the user doesn't have a super-splooge-worthy monitor, but rather has a cruddy second-hand NTSC tube display with a monaural two-inch paper cone speaker. Otherwise, they'll return the game and/or the Wii to WalMart and say, "It doesn't work."