but
"Apple doesn't like it when you mess with its precious little creations. Cupertino made everyone remember that this week when it said nobody was allowed to run watch apps on the Apple Watch. We're not kidding, either. These were the iThing maker's exact words:"
That has always been their message on the iPhone - duplicate functionality without significant innovation and we won't take it. Tuff maybe, but clear and it has some advantages for both Apple and the user.