Yeah, there's just something about this that looks like a fan game. People want remakes not just to pretty up existing games, but to bring games up to modern standards. Granted, Metal Gear Solid games hold better than most when it comes to how they play and look, but there was room for improvement as seen with later entries.
One of the things I notice they neglect to show in the trailer is someone's face when they talk. Original MGS3 didn't exactly have the best facial capture for dialogue. Some shots looked like weird lip flap, and since modern facial capture is not part of the original game, I'm doubting that's going to be in this game either. That's going to make this new character models look really weird during cutscenes.