dont forget the wii u can also play wii games.
i don't know about a skyward sword remake though, the joycons have good motion controls in themselves so it might not be that hard to make a remake.
the art style would definitely benefit from more stronger hardware.
my biggest gripes with skyward sword actually have to do with an over emphasis on story and the mostly boring sky. it had a few other annoying stuff like the backtracking but the game was still fun to play.