The big question is how it works. It is unclear whether this is the macOS that will simulate iOS or the developer will have to code 2 applications separately. The closer the two platforms are, the easier it is for the developer, but it is also a great risk for the user if the interface used on this platform looks inappropriate because it is used for another platform.
Microsoft has also tried to do the same with Universal Windows Platform applications, allowing developers to create applications that run on both Windows, Windows Phone, Xbox, HoloLens and even Surface Hub. This also has certain limitations when there are always platforms that developers don't care about with other platforms. Google also shares the same path when trying to bring Android apps to Chrome OS.
See more: