The need to do this for all shows, in season long plans. They sell old seasons for ~1.50 an episode (when you buy them all at once) but that's a bit pricey still, as it's not much less than a DVD set is inferior in many ways.
Now, if you could PREBUY a season for ~$1 an episode (seems like prepaying should be cheaper, for some reason), or $25/year for most shows, AND they upped the resolution, I think they would be onto something.
I'd actually be willing to pay for an as filled version. Not much, mind you, but pay. Maybe $10 for 25 episodes? Assuming, again, they were DVD resolution.
Gah, when are they going to make an Airport Express AV so we don't have to buy a $300 iPod or a $600 computer to watch stuff on our TVs?! And, yes, .11g can easily carry enough data to stream DVD quality video.