Cover: AI-generated concept illustration of a hypothetical foldable phone, not a photograph of existing hardware or a screenshot of the emulator. It started with the idea of a dual-screen iPhone. That form factor seems almost made for Nintendo DS and 3DS games: the main display above, the touchscreen below. But before thinking about a finished app, I wanted to answer a smaller question: could a 3DS emulator run on an iPhone at a useful speed? For this experiment, I couldn't rely on giv...