Skyward Sword used gyro for aiming and not the IR pointer, so that's not an issue.So it could still be somewhat tricky. Unless they revamped it without motion controls, but that'd be a haul right there and would change a lot of the game. Though it'd be possible, and the game would still be awesome. And maybe more people could appreciate it that way.
I'd still want motion controls though as I find the combat and aiming to be super fun, but I would take an HD remaster in just about any form.