That does sound impressive in fairness. My first thought was being a little like No Man's Sky in terms of hopping to different planets and the like.
My only concern (yes, I'm a pessimistic asshole) is that it's being developed under Ubisoft, where their open world games have basically become cookie cutters now. Whether it's Assassin's Creed, Far Cry, Watch Dogs or any other open world games under them, they're all quite similar to each other.