Well for macOS, opening in an external window would be cool.

So

• Picture in picture (multitasking outside of app + in app while browsing)
  • it would be kinda funny (sorta cool) to have a watchOS counterpart so you can “swipe it” onto your watch for viewing when on mobile.
    • actually tvOS airplay makes more sense. Actually, airplay would be a cool browsing experience.
• open in external window (macOS)
• Drawer/airplay for iOS?