This thread has made a pretty strong point against split-screen multitasking.
Maybe that isn't what we need in a full-blown feature. Apple should become more open to a dual-use apps that are multitasking with a purpose. A well-constructed text editor with a web browser or a YouTube player with a Safari window on top would make perfect sense. Perhaps as a feature in its own not enough apps would support it to be worthwhile but apps designed for a simultaneous dual purpose could be fine-tuned enough to be.
Maybe that isn't what we need in a full-blown feature. Apple should become more open to a dual-use apps that are multitasking with a purpose. A well-constructed text editor with a web browser or a YouTube player with a Safari window on top would make perfect sense. Perhaps as a feature in its own not enough apps would support it to be worthwhile but apps designed for a simultaneous dual purpose could be fine-tuned enough to be.