What exactly does the iPhone 8 mean for Apple?

To date, the iPhone 6 is still responsible for the biggest iPhone upgrade cycle in history. And with good reason, the iPhone 6 marked the first time Apple delved into the world of larger-screened iPhones, at long last giving users with a preference for larger screens a compelling reason to upgrade. What's more, Apple in 2014 didn't just release one new device; rather, it released two distinct iPhone models, the 4.7-inch iPhone 6 and the gargantuan 5.5-inch iPhone 6 Plus.