iPhone Duo brings multitasking to iPhone, but only just

The iPhone Duo inner display brings multitasking to iPhone, but it stops just short of really turning Apple's first foldable into a multitasking monster. Here's how it works, and what the limitations are.
iPhone Duo can run to apps side by side
For years now, some of us have used iPhones as portable workstations thanks to big displays and super-fast chips. But the iPhone Duo takes things to a whole new level, whether you're working or having fun.Apple's iPhone Duo multitasking isn't quite on par