DVD sales of cancelled TV shows, such as Freaks and Geeks, are changing the business model of television. Actually, DVD sales of television shows in general are changing the business model of television. Right now, people would much rather buy and watch TV series on DVD than what's currently on as first run shows. The production companies know this, and that is why nearly every TV show ever made has or will have a DVD box set. Then you have series on cable channels and HBO(Sex and the City, The Sopranos, The Shield, etc.) that are rapidly taking away viewers from the traditional prime time network line-ups. The networks, though, aren't helping their scripted shows much by saturating the market with reality television and leaving scripted shows hanging on a limb.
You might be complaining about Third Watch, but wait when Arrested Development gets the axe. I'm going to be livid. You have the best written comedy on television in years. The show has an incredible cast and performances, and simply outrageous stories, yet people don't watch it because it's not a "traditional laugh track" comedy. The only consolation I have about it is that I will have my DVD sets, and another network(probably cable) will pick it up. Fox decides its fate on May 19th.
Anyways, look at Family Guy for an example on the changing world of television. Fox jerked it around several time slots in its initial run, and it got bad ratings. As a result, it got cancelled, but Cartoon Network picked up the reruns for Adult Swim, which happened to be a magnet for THE target audience for Family Guy. While that was happening, the DVD packages came out. Put all that together and...
The rest is history.
-Family Guy on Cartoon Network did monster ratings and still does
-The DVD sales went through the roof and made loads of money
-Fox learned from its mistake and "un-cancelled" the show, which was the first time DVD sales had actually caused that to happen
-Family Guy returned to the air last night, May 1st. The first gag they did was Peter telling his family they had gotten cancelled. He then said Fox had to make room for a lot of other shows. He proceeded to list every show Fox had cancelled after Family Guy. He then said that they might have a shot of getting on the air if all of those shows fail. Man, I'm glad Family Guy is back.