tl;dr: Apple's WWDC 2026 sample app—an origami folding tutorial—plus heavy emphasis on resizable layouts and "dynamic range of sizes and aspect ratios" strongly hint at an upcoming foldable iPhone. Developers digging into the iOS 27 beta found new API strings like `foldState`, `angleDegrees`, and a key querying the number of built-in displays. The rumored "iPhone Ultra" is a book-style foldable with a ~7.8-inch inner display, ~$2,000 price, and a September unveiling led by incoming CEO John Ternus, who oversaw its development.