If gestures makes User Stories more concrete when we design experiences for user interfaces with User-Centered Design in mind, then, Agile or Lean approach is what makes User Stories central for Jira, Microsoft Project, Trello or Asana productivity when defining the problem to be solve with the power behind each delivered MVP.

In this way, research, design and development for the Apple Watch as a wearable interface, is even easier to accelerate when understanding how users can interact anytime with Apple's ecosystems of devices. Especially when users hands are full. Users can just double tap the index finger and thumb together to answer a call, open a notification, play and pause music, and way more with third party applications created by an entire worldwide village of designers & developers where I fit in.