For a game with a $60 retail price, approximately 43%, or $26, goes to covering manufacturing costs, retail profits, and subsidizing console hardware. With digital distribution, if we stop subsidizing hardware with software, nearly all of that $26 in costs can be eliminated. Developers and publishers would sacrifice none of their profits, consumers get cheaper games, and console makers can make profits on selling their hardware.
See, this is a good idea in theory. But so far in digital distribution, the pricing is exactly the same as hard copies in store. And I don't know about you folks, but If I'm going to spend 30-60 bucks on a game I sure as hell want something to show for it.
There's a lot of potential for good with digital distribution, but I'm afraid there's much more potential for bad. I don't think developers and console manufacturers see cheaper distribution with DD, they see a higher profit margin.