I would love to see FFVI properly remade with PS4-level graphics but it's never going to happen. There's way more demand for a FFVII remake and Square Enix has been dithering about that for like ten years now. I can almost even see why FFVII would benefit better from a remake, since it has some rather glaring flaws that could be fixed in a remake (although frankly, the current version of Square Enix isn't competent enough to do so). That doesn't mean a proper FFVI remake wouldn't thrill the hell out of me though.
I also don't agree with the idea that a numbered entry in the series should be a remake of an earlier entry.