iTunes TV is insanely expensive, for instance I recently watched Heroes on Hulu (I had to borrow a few episodes when I fell behind because NBC "didn't want me watching" the show on a channel that made them money). Total cost to me for casual TV viewing: $0 and a few targeted adds that I liked.

iTunes wants $37.99 for a DRM'ed season, and I would need to buy three of them for $113.97. This is an absolute deal breaker, I would never buy anything that expensive with non-broken DRM on it. Actually, I take that back, I would never pay much more than about $10/season for a reasonably well produced but overall forgettable television show.

So, basically, the idea of charging for television content per show isn't going to happen unless everyone abruptly cancels their cable service tomorrow and inexplicably spends the exact same amount on TV shows al-a-carte while somehow maintaining their casual television viewing habits that make it such a golden advertising medium.