So I guess the question goes to those who own 1.5 HD Remix, does it look any better than what was on the PS3?

I would say yes, but not dramatically so. The biggest difference is that it looks like they are targeting a framerate of 60fps instead of 30. Textures look pretty much the same and the difference in resolution isn't as noticeable as it could be because of the art style. I would say its in the realm of "If you can get either, get the PS4 version. If you have the PS3 versions already, not worth buying again."