Users can downscale the Nintendo Switch's native resolution down to 480p (standard definition) when its docked in TV Mode. Why would anyone need to adjust the system's resolution? Maybe it has something to do with Gamecube games, which run at 480p?
Some retailers apparently broke street date on the Nintendo Switch, and the lucky owners have uploaded some footage of the Switch to the net. When watching the footage I noticed something very, very interesting: in the Switch's settings you can adjust its TV Resolution and set it to 480p. While docked in TV Mode the Switch switches from the tablet's 720p up to full 1080p HD resolution while playing actual retail Switch games, so this 480p setting could be for Virtual Console platforms and games.
This could strongly hint that the Switch will have Gamecube VC games that run at 480p, and that gamers could set the system's internal resolution at 480p to ensure Gamecube games run in their native resolution HDTVs. I also bet the Switch has the option to change from 16:9 to 4:3 aspect ratio to match the native ratio of older games--but some Gamecube games actually support 16:9. This would effectively make older Gamecube and other Virtual Console games look better on high-definition televisions.