There are many problems to be solved in health monitoring and sleep- and fitness-tracking. And there is a real market for fitness bands, even if it&#x27;s not a huge one.<p>There&#x27;s also a designer watch&#x2F;fashion market, which is the one that seems to be of more interest to Apple. However, it doesn&#x27;t appear to be winning in that one.<p>The current Apple Watch market appears to be &quot;geeks with iPhones who live in Silicon Valley, or wannabees&quot;. How is it doing there?