Apple is looking for a way to 'converge a toaster and a refrigerator' by means of creating its own version of a unified app platform similar to what Microsoft currently has in Windows 10. The unified app platform will enable apps to seamlessly scale and work across iOS and macOS.
https://www.notebookcheck.net/Apple-mulling-at-unified-app-development-a-la-Microsoft-s-UWP.273078.0.html