It is a truism of American life that you only get one chance to Have it All. Steve Jobs’ first chance at dominating a computer platform died at the hands of Bill Gates in the early 1980s, in large part because Gates was willing to license his technology to clone makers while Jobs was not. Now comes Apple’s wildly popular iPhone: will Steve Jobs enjoy a second act with this new platform even more successful than the first — or only a replay, and for the same reasons?