More people have tvs than telephones or flushing toilets.
Like it or not the entire country will switch to HDTV by government mandate. HDTV has been called the greatest event in the history of television since the introduction of color in the 1950s. Standard definition broadcasts are sent using analog signals. HDTV uses digital signals, comparable to the coding used by computers to receive data. HDTV doubles the scan lines of conventional television and boosts the number of pixels.