According to @ai_darpa, leaks suggest that Apple's upcoming iPhone Fold could use ultra-thin flexible glass engineered to be thinner at the hinge and thicker elsewhere, effectively distributing stress and eliminating visible creases even after thousands of folds (source: @ai_darpa, Dec 23, 2025). The device is expected to have a book-style, squarer form factor with a 5.49-inch outer display and a 7.76-inch inner display. If the foldable runs iPadOS, it could enable advanced multitasking and AI-powered productivity features, creating significant opportunities for AI app developers targeting mobile multitasking and productivity markets. This innovation in foldable hardware design may also drive demand for AI-driven optimization in user interfaces and device management, further expanding the ecosystem for AI solutions in next-generation mobile devices.