Digital TVs in More Than 50 Percent of U.S. Homes
 

Though there has been concern on Capitol Hill over consumers' readiness for the impending digital TV transition, the Consumer Electronics Association (CEA) reports that over 50 percent of American households now own a digital TV.

http://www.pcmag.com/article2/0,2704,2242176,00.asp

For some unknown reason; some of the digital TVs could receive HD programs without paying for it via cable. In this case, both users subsribe from the same provider and live several miles from each other. :)