Now, Mark may conclude that TV is much more fulfilling, but I'm not sure the younger crowd agrees. If online video is just a snack, unfortunately for the TV networks there's a whole buffet out there. It includes video games, MySpace, IM'ing, IPOD's, and everything else (even, gasp, a game of catch with friends in the great outdoors). TV used to be pretty much the one and only entertainment format in the home. Those days are past. It's a crowded room now. Getting the user's attention and keeping it is becoming more and more difficult.
In the spirit of the analogy, perhaps TV is that really good meal you had the other night that's still in the fridge but you worry won't "keep" if you keep it around much longer? Eh...probably not.