If digital copy = gotten from Steam with ONLY Steam protection, then yeah sure, why not.
If digital copy = the Xbox version where they pop out the game as a digital download AGES after it has been released for more money than it costs to go out to the store and find a second-hand copy, then no, I'll take my physical copy, thank you.
And certain really awesome games I want physical, too. Like StarCraft 2, or collectors editions...