Most TVs and components still have coax cable connectors in addition to HDMI. In our case, as we are not using any satellite, I am just using coax that was installed in our coach. Believe it or not, High def signals work just as good for the purpose as HDMI. The major limit is how good of a signal you have in the first place. If we are local to a good OTA station, I get a really good HD picture. Another thing, the picture can never be any better that what comes down a coax from the antenna. I do have my DVD player attached to our main TV via HDMI, but it is also connected to the back TV via coax, and we can't tell the difference.