Oooh, the touch screen. That's smart.Incase anyone else is concerned, Polygon article got a comment from nintendo which states the following:
Super Mario Galaxy is supported in TV, Tabletop and Handheld Modes. In TV and Tabletop modes, motion controls are required for pointer functionality. In Handheld Mode, pointer functionality has been adapted to use Touch Screen.
Article: https://www.polygon.com/2020/9/3/21420227/super-mario-3d-all-stars-galaxy-switch-motion-controls-wii
Can't wait to play Galaxy on the go, holy shit.