I am continually surprised by how much HD programming is available via major networks free over the air. I use DISH 811 HDTV receiver and have a Channel Master antenna, which picks up every local station.
It almost seems like the majority of primetime network programming is now broadcast in HDTV. Flip the channel, and there it is again, HDTV. Most programming is NOT HDTV during daytime and off-peak hours, but I"m not watching TV during these times, either.
It was a real pleasure to watch the Superbowl and Academy awards in HDTV for the first time, FREE over the air. Jay Lenno, CSI, Wil and Grace, Star Trek, and numerous other shows are now in HD.
BTW, the PQ of OTA non-HD channels will simply blow away the non-HD same channels over satellite and digital cable, over the same receiver/TV. IMO it's not even an option not to have a good OTA UHF antenna.