Eric, the antenna itself is simply a regular UHF and/or VHF TV antenna; there aren't any HDTV antennas as such. If the station is broadcating a HDTV program, that's what the antenna picks up, of course. If your TV has a DVI input you can use it if you get a cable or satellite receiver with a DVI output, but it wouldn't likely look any better than using the component cables. If you get a HD receiver from direct-tv you wouldn't necessarily need to get HD tuner for the TV unless you also wanted to receive HD programs OTA.
