There are several reasons the broadcasters wanted to go digital. First they could provide 6 or more channels on their assigned bandwidth (Channel)No ghosting or snow. Stations can use adjacent channels allowing for closer spacing. Analog required guard channels assigned between each channel in each broadcast area. With broadcasters competing with cable, broadband and sat., this will allow them some more choices. Another note, all the digital stations are NOT on UHF. In most of the US broadcasters are moving off of the low VHF ch 2-6 but High band 7-13 will sill be used. Most stations were allowed the choice by the FCC to stay with their temporary digital assigned freq. or return to their old analog assignment. There is NO requirement for cable co to switch. If they do its their choice, but they cannot use the same digital broadcast format as broadcasters due to technical issues. Robert