- Fullscreen
- Image capture
- Resize observer
- Broadcast Channel
Demos that don't:
- Clipboard API (not supported)
- Battery API (not supported)
- Performance information (says it's supported, but shows an empty page)
- Vibration API (supported by the browser, but doesn't actually vibrate because malvertisers abuse the API in their antivirus scams)
- Bluetooth API (not supported)
The fullscreen, image capture and broadcast channel APIs are nice I suppose, but the rest should probably be considered "Chrome APIs" rather than "web APIs".
Edit: even in Chrome on Android, the battery API is reporting fake information and the vibration demo doesn't work. That's the problem with experimental web APIs, you can't rely on them at all.