likely the pre-order of digital edition is for PS only because Bungie is hitting a new market, very hard in fact, since PS always wanted the Halo games, Bungie is making it up by giving them all this stuff (early access content that every one will have later on [yet not many people will read that, and end up just complaining like kids]). but probably the Digital edition will go for Xbox Marketplace as well before the game releases, you know Microsoft wants there money for a online preorder.