A watch, even a very nice watch, is still just a watch. The Apple Watch is body technology disguised as a watch, with all the possibilities this implies. Whether the luxury watch makers have anything to fear from Apple remains to be seen, but it does seem clear that the two segments only incidentally overlap in the longer run.
And these companies aren't just preparing to compete against
watch 1.0, they are preparing to compete against 5.0 a decade from now. Design is where they can make their mark. The tech might be impossible for them now, but perhaps with some practice they can get an android wear to be integrated into one of their classic designs.