Current features are enough for "Mental Poker":
* WebRTC rendezvous
* Shuffle the deck
* Deal cards face-up or face-down
* Provably reveal the contents of cards
* Discard from their hands without revealing the cards
* Chat
Watching the NASA live stream of the Perseverance rover landing now and marveling at how far we have come since the first hand-drawn image from the surface of Mars in 1965. https://solarsystem.nasa.gov/resources/693/first-tv-image-of-mars-hand-colored/