iPhone Killer: The Secret History of the Apple Watch by David Pierce for Wired:
“Take the feature called Short Look: You feel a pulse on your wrist, which means you’ve just received a text message. You flick your wrist up and see the words ‘Message from Joe.’ If you put your wrist down immediately, the message stays unread and the notification goes away. If you keep your wrist up, the message is displayed on the Watch’s screen. Your level of interest in the information, as demonstrated by your reaction to it, is the only cue the Watch needs to prioritize. It’s interactions like this that the Watch team created to get your face out of your tech.”
This feature is a great example of how the Watch will displace the iPhone.
Phones have become all-purpose. Within them the user expects to find a myriad of things each with varying value: nagging work email, delightfully distracting games, important messages from family, etc. Therefore the Watch must only provide the user with whatever is both important and brief. It cannot squander the intimate nature of its relationship with the user by simply forwarding everything along.
Because the Watch will occupy not only a unique physical position but also a conceptual one (only a subset of tasks are dealt with), it will establish a new echelon in personal computing. And the phone will begin to be appear more like its predecessor: More cumbersome, valuable at times, but no longer indispensable.