I am fully with Horace Dediu on this:
Phone is just an app which, for me at least, is not frequently used. I communicate with my iPhone but the go-to app is iMessage or FaceTime or Skype or maybe Email or Twitter. Phone is something I use so rarely that the interface sometimes baffles me. And yes, it’s an Internet appliance. Browsing is something I do quite a bit but many of the browsing jobs-to-be-done are done better by apps. News, shopping Facebook and maps are “things which were once done in a browser.”
He makes the point that when Steve Jobs launched the iPhone he described it as a combination of a wide-screen iPod, a phone and a breakthrough internet connector. These three things, says Dediu, are no longer the most used features.
Similarly, the Apple Watch was launched as a precise timepiece, a new, intimate way to communicate and a comprehensive health and fitness device. But it will develop over the coming years and who is to say what its most useful features will be seven years hence?