We can debate the video quality of OTA HDTV vs. DirecTV's new MPEG4 HDTV local channels, but I think main benefit of having OTA reception along with your satellite-delivered channels is simply reception of the "lesser" channels in your area. DirecTV has only committed to provide the "major networks" -- CBS, NBC, ABC and Fox. In some cities they also provide CW, but that's rare. If you want any of the other HDTV channels in your area, you'll need an antenna and OTA tuners in your DVR/Receiver. And, even with those "major networks", if you want any of their subchannels (e.g. WeatherPlus or The Tube), you'll need need OTA reception.