It's RE4! It's not really meaningfully different in enough ways to have been worth a remake. It's definitely way more polished but I really never thought that the PS4 version of the HD remaster needed any extra attention. I think that we're reaching the point in games where even nearly 20 year old games stand on their own and don't need full remakes. WHERE is my Code Veronica????
That said, this game was definitely worth my time and I would consider it the definitive way to play the game, although the VR version will always be my favorite.
This game isn't exactly a carbon copy, most everything is just slightly different, so if you're intimately familiar with the original, you will notice, and it'll definitely feel fresh. Overall I'm not exactly impressed but it was fun.