When you equate that could be about $600-800 a year saved for even more games or gadgets, trade in value of a game you will never play again, vacations, drinks, bar, anything... Is it worth it? Expendable income is great to have when one can buy anything they want, but it doesn't need to equate to throwing money down the pisser either.
Dunno. I am guilty at times myself of buying digital because I am too lazy to get up on a weekend and drive 4 miles to a Best Buy... But when I look at the savings, it's harder and harder to justify buying digital versions that I can't trade in if I want too.