I think its just the professional BlackBerry image RIM is trying to keep. Charging $200/app means only serious developers will even think about the BlackBerry (and yes, they WILL think about it). BB has always been about business or productivety. While it might be nice to play a game on your BB, that's not the focus RIM is trying to create. RIM made their name selling business-oriented hardware. They see no reason to extend into the multi-purpose fad just because Apple, Google, Nokia, and everyone else is jumping there. RIMs mistake has been releasing toy phones like the Pearl and the new touchscreen (Groove, Curve, Cloud, whatever it is). Remember, serious businesses are still buying their execs BlackBerries, not iPhones (even Obama has his BlackBerry). As for Microsoft, when have they not jumped on a fad?