It's not really possible to say, for all intents and purposes the game is being re-made for PC, the old system requirements were there because they made a complete ass of it so I think they will change.
Right now I don't think you have a very good chance of playing it well assuming you can get hold of a copy before they re-release it.
Having said that I'm sure there'll be some setting you can play it at, maybe 720p if you have to once it's been released again.