Still, my bet is that when the smoke clears after a few years, iPhone and BlackBerry will be what matters in North America, with BlackBerry becoming the "safe" choice for businesses that don't want their employees accessing the Web or running personal apps -- the lock-down device, essentially -- and the iPhone being the dominant device by individuals and most businesses. In Europe, I see a three-way market led by Nokia's Symbian and followed closely by the iPhone, with the BlackBerry being the choice of the multinational business and government agency crowd.
In Asia and the rest of the world, I haven't a clue. My belief is that Nokia's Asian dominance has more to do with a slow awakening to mobile devices as information devices outside Japan and South Korea, and Nokia's not exactly been an innovator in its Symbian efforts. Latin America and Africa are also too new to the information revolution to know what will take off there; thin-client apps that run on the regions' 2G networks simply make more sense for now than the thick-client, bandwidth-intensive uses that the iPhone, BlackBerry, Android, Nokia, et al. devices are moving to.
The wild card remains Android. And we'll see soon how that hand plays.