WSJ discusses the idea of a single device that can do it all:
Two months ago, Steve Jobs stood onstage in San Francisco and walked the Apple faithful through a demonstration of the company’s forthcoming iPhone. He showed off its bright, beautiful touch-sensitive screen and bag of associated goodies, from a cool voicemail system to an attractive Web browser. It all looked so elegant and easy.
More important, it played to a fantasy that so many companies have long lusted to fulfill: the dream of One Device. What consumer, they figure, could resist a gadget that can combine the functions of a cellphone, personal digital assistant and digital music player?