Hello everybody ! I see here and there that our saves will be cross-platform on a particular "brand" (i.e PS & Xbox). I am so relieved about that news ! But i have to ask ... Do we need to buy the game on both systems ? I'm ok for the "buy now on a last gen console and play later on your future next gen console" But ... not for buy your game on last gen & next gen so you can play on both .... Any piece of info about that ?