Check the full article for some charts of Apple's transformation over the last decade; also see Benedict Evans on How Both Apple and Google Are Winning the Smartphone Wars (Video) (Re/code)
"It's a dilemma any CEO would love to have: The iPhone generated $102 billion in sales in Apple's last fiscal year, more than Google, Facebook, and Twitter's annual revenue combined.The IPhone Company - Bloomberg Business
To put in perspective how large the iPhone business has become, look at the car market Apple has been exploring whether to enter. According to Benedict Evans, a research analyst and partner at venture capital firm Andreesen Horowitz, the premium car market, which includes Mercedes-Benz, BMW, Audi, and Lexus, generates about $220 billion in annual revenue. "For comparison," he wrote on Aug. 21, "iPhone revenue in the last 12 months was $146.6 billion.""