That is one valid reason.... and a good one (especially on the iPad 3 that has more pixels than any of my monitors).
As I watched the Yankees play today in the the AtBat12 app I realized another need: FakeLocation. Living out in Arizona with my favorite team so far away I usually don't have to worry about blackouts. But they do happen when the Yanks play the Dbacks (dang interleague play!). Personally I think blackouts are absurd at the price we pay for MLB.tv. But with FakeLocation last year my iPad and iPhone were in some gawd-forsaken cow pasture in Wyoming--far from any MLB franchise.