By Joe Wilcox, Betanews. Guess what's coming to San Diego in two weeks? If you answered iPhone 4, congratulations for being right but not giving the right answer. Microsoft plans to open a new retail store on the same day (its second in California). The duo launches could be speculator competition and ground zero for fandom, should the "I'm a Mac" and "I'm a PC" crowds choose to rally for their camps.





