"Devotees of Home & Garden Television, sitting in the comfort of their living rooms on the 33rd floor of a Manhattan high-rise, probably could not care less about commercials for lawn mowers or snow blowers. If they have TiVo, they probably zap right through the ads; if not, they can just change channels.

Soon, however, viewers may no longer be assaulted by ads that all but demand to be ignored. Technology, cable and satellite companies are scrambling to offer advertisers the ability to learn enough about who you are and where you live so that the likes of Home Depot will be able to send a different, more suitable ad to an apartment dweller - say, an ad pushing a kitchen upgrade."

One version of the future for businesses that advertise on TV. From the New York Times (free registration required).
URLs:

http://www.nytimes.com/2005/03/27/business/yourmoney/27dvr.html