⌚
WATCH
Morning 3-line brief
✓ CAN
Glance · haptic · 1 action
✗ CANNOT
Long text · complex decisions
🎧
EARBUDS
Commute audio summary
✓ CAN
Voice · ambient · hands-free
✗ CANNOT
Visuals · list manipulation
📺
TV
Family movie · big-screen recipe
✓ CAN
Big screen · shared · story
✗ CANNOT
Private info · personal pings
🖥
KITCHEN
Cooking next-step · fridge memo
✓ CAN
Hands-full mode · step flow · ambient
✗ CANNOT
Long viewing · complex input
📱
PHONE
Complex tasks · deep decisions
✓ CAN
Full features · deep ops · private
✗ CANNOT
Shared display · long gazing
Cross-Reference Matrix
Surface-to-Surface Handoff
✓natural
△situational
✗breaks
| ⌚W | 🎧E | 📺TV | 🖥K | 📱P | |
|---|---|---|---|---|---|
| ⌚ Watch → | — | ✓ | ✗ | △ | ✓ |
| 🎧 EarBuds → | ✓ | — | ✗ | ✓ | ✓ |
| 📺 TV → | △ | △ | — | ✓ | ✓ |
| 🖥 Kitchen → | △ | ✓ | ✓ | — | ✓ |
| 📱 Phone → | ✓ | ✓ | △ | ✓ | — |
Read: row → column.
Watch → Phone = ✓ (natural deepening). Watch → TV = ✗ (private → shared: Social Exposure breach).