If speculation about Apple‘s (NASDAQ: AAPL) iPhone 7 is at least somewhat accurate, it will keep the same overall form factor as the last two flagship iPhones, the iPhone 6s and 6. While another year of the same form factor for the iPhone 6 may be disappointing to some investors, there may be an overlooked benefit to maintaining this design one more year: It could keep iPhone costs lower, helping Apple’s gross profit margin.