I don't get the $100 difference in price estimates. When guessing the price there are some good articles breaking down the cost of each component to come up with a price. This is how Sony and MS do it. What optical drive would they put in that costs them $100?

Personally I would expect to see a $50 difference or the digital version is by far the better deal.

It would be nice to see the digital version be $500 but have a lot more storage. Optical should be cheaper with less storage.