Great article. I actually think this could be a severe risk to Apple. The trend in any competitive market is for margins to converge towards 0. In particular

Great article. I actually think this could be a severe risk to Apple. The trend in any competitive market is for margins to converge towards 0. In particular, iOS is already facing competition from Android, and RIMM isn't exactly going to die without a fight either. Having so much of the company's margin wrapped up in one product would set off alarm bells for me. I don't care what their current stock valuation says.