The document analyzes the evolution of iPhone models and marketing slogans over time. It finds that iPhones have become incrementally improved versions of prior models, with marketing slogans also becoming more repetitive. Charts show specs like memory, screen size, camera resolution increasing gradually each release. The document predicts future iPhones from 2014-2021 will continue this pattern of minor annual hardware upgrades. It questions if Apple relies too heavily on the original iPhone design and is now being out-innovated by competitors.