Whether it's stand alone or not. Separate from the original or not. Someone else, is taking the original work and covering it up with a new engine, completely erasing all of the handmade, painstaking, detail Ueda's original team put into this world.
New game: "Oh lets plop some grass here, use some pre-generated rock textures here, take out the fog they had here....
I really don't care if people say just view it as a separate game entirely apart from the original. The game is still being tampered with against Fumito Ueda's wishes and without any kind of input or direction from him, or his team. And without any new content there is not a good enough reason to spend $60 dollars again. I can admire the original graphics more than this game, because that is the original vision not a re-skin of Unreal Engine, someone is making for a fast cash-in opportunity.
If they had a few old Team Ico members helping out or handling certain aspects of the remake, I would be completely fine with it and excited! But, anyone else touching Team Ico's work feels taboo to me. It's like you admire the full trilogy of Team Ico's work and then some guy takes one of the games and makes it according to his own vision.
I guess the only up side or purpose is to maybe expose more people to the game who haven't played it or heard of it...But people had 2 chances to play it across two console generations!...And it's not like the game didn't sell well or wasn't positively accepted, hence the reason for this quick and easy cash-in!