Wear OS Spotlight Week highlights Material 3 Expressive, a new design system for premium Wear OS apps and tiles. This system focuses on creating engaging and intuitive user experiences that reflect brand identity while respecting device performance. Key principles include embracing the round form factor, applying proper screen layouts, elevating experiences with dynamic color and typography, and showcasing expressive animations. Components like the edge-hugging button are designed to complement the watch's circular display. For apps, the TransformingLazyColumn offers fluid scrolling animations, while non-scrolling apps utilize glanceable templates. Tiles benefit from a new 3-slot layout for clear content structure, enabling quick actions and at-a-glance information. Material 3 Expressive expands color palettes to better reflect brand personality and utilizes variable fonts for dynamic typography. Shape morphing enables expressive animations, allowing components to transform in response to user input for visual interest and feedback. By adopting these principles, developers can create more dynamic and personal Wear OS experiences. Resources like updated documentation, design kits, and codelabs are available to help developers get started.