At the moment? No. Eventually? Probably. MS and Sony for that matter will have to start offering their own preorder bonus or allow Gamestop and the likes to have digital preorders if they want digital to take off.
Theres too many people who care about preorder bonuses.
I haven't seen any more details but on IGN's ask Microsoft anything page the question was asked about getting pre order bonuses and special edition content with digital downloads and it was confirmed with more information to come in the future.