Listening to the crystal-clear tones of Audemars Piguet’s new Royal Oak Concept RD#1—completely audible from across the room—epitomizes the sort of transcendent moments that can occur at the annual Swiss watch shows. Even though the watch is not a commercial product, and has no future release date announced, to hear it is to know that a page has been turned in the development of the complication. And while the Concept RD#1 may have stolen the show, there were plenty of other significant release…