Apple's new CEO, John Ternus, introduced the latest iPhones and the company's first foldable phone, the Duo, at a recent event. The Duo features a 7.6-inch display and allows users to run two apps simultaneously, starting at $1,999. Ternus emphasized improvements in battery life, camera capabilities, and AI integration in the new iPhone 18 models, while also acknowledging the challenges of entering the foldable smartphone market.