New York Times published an article titled: Google Wants to Dominate Madison Avenue, Too. According to the article, Google wants to use its technology to make ads on TV (and just about everywhere else) more relevant.
"Now Google is preparing to extend its technology to nearly every other medium, most significantly television. It is looking toward a world of digital cable boxes and Internet-delivered television that will allow it to show commercials tailored for each viewer, as it does now for each Web page it displays."