Big screens won.
For the past three years, the most meaningful change to the iPhone has been the size of its screen. After years of sticking with a 3.5-inch display and watching Android-powered competitors bite off a piece of the market with ever-larger screens, Apple relented ever-so-slightly with the 4-inch iPhone 5 and 5S, and then finally gave in to obvious trends with the much larger 4.7-inch iPhone 6 and massive 5.5-inch iPhone 6 Plus.
Big screens are all people really wanted in a phone; when they couldn t get big screens from Apple, they bought big screens from Samsung, and when Apple finally put out big screens, Samsung's sales tanked.
So now we have an iPhone with a big screen, with skyrocketing sales. There's no obvious reason to...