Nintendo has already been selling a small selection of GameCube and Wii games that run emulated on Switch’s processor (Tegra X1) in 1080p.

• On the Switch itself: Super Mario 3D All-Stars runs emulators for Mario Sunshine (GC) and Galaxy (Wii)
• On the Nvidia Shield TV, which uses the same processor: Twilight Princess (GC), NSMB Wii, Punch-Out (Wii), Mario Galaxy (Wii), Donkey Kong Country Returns (Wii). Only available on Shield systems sold in China.

The Dolphin emulator can be installed on Nvidia Shield (Android) and, thanks to modding, on exploitable Switch systems as well.

However, this newly announced library of GameCube games is only for Switch 2, which has drastically more powerful hardware than the 8-year-old original Switch.