Simon Metcalfe discusses themes and considerations for the future of UX, including micro interactions, continuity across devices, contextual awareness, and bridging digital and physical experiences. For smartwatches specifically, he outlines design recommendations such as keeping interactions short and simple, prioritizing gestures over UI elements due to limited screen space, ensuring continuity when transitioning tasks between devices, and leveraging predictive intelligence and contextual information. He also explores opportunities for blending digital experiences through technologies like heads-up displays, internet of things, and beacon-enabled interactions.