Does it matter? Since I'm assuming you already have the game lol =P
Well it is a turn off for possible new buyers , i've seen more recent games on steam being sold by 37 $ And when i mean by more recent i mean THE ORANGE BOX. (about 4 games)D2+LoD=40 $. Call me crazy but that's freakin expensive.
This is a great thing - some people don't want to go out and pick the game up, but they will buy it digitally if they could, and this will help future sells for Blizzard since they don't have a middle man for digital downloads, no boxes and selling in bulk to ebgames/gamestop etc.