In addition to the joycons mentioned, they sell a standalone charger stand.

So they could sit next to the switch 2, on a dedicated stand.

Nah the direct didn’t claim 4k at 120.

You get 1080p at 120, or 4k at 60.

https://www.nintendo.com/us/gaming-systems/switch-2/featured-games/mario-kart-world/

Scroll down a good amount, 79.99$ MSRP for Mario kart world. Thats not a guarantee they’ll all be 80$. The new donkey Kong is 70$. No official word on other games, though.