In reading a recent Apple Watch review, I was struck by this quote: ...I began thinking about the operational protocol for the Apple Watch's Digital Crown, and how it would be nice if pressing the crown was consistently the input, rather than having to reach for the screen. The finely engineered Digital Crown is already a pleasure to use, but if you could navigate and click through the whole watch with a single finger tip it would reache a whole new pinnacle of physical input devices. I wonder if that is how it was initially set-up? ...with the other side button operating strictly as a home button. I bet Apple's strict short interaction discipline put the kibosh on this dream.