There will be no such fracture. Insofar as voice becomes a useful interface for services, smart watches will proliferate. They don't need to be unlocked as long

There will be no such fracture. Insofar as voice becomes a useful interface for services, smart watches will proliferate. They don't need to be unlocked as long as they're on your wrist. They eliminate the problem of talking to an invisible microphone that made Bluetooth headsets become less popular. Smart watches will take off. For all ages.