FreeAir.tv and CloudAntenna works with free-to-air channels broadcasted by local networks, like ABC, NBC, CBS, Fox, The CW, PBS and others, in USA. In Europe, UK has over 80 channels free-to-air, Germany has over 200 satellite and 12 free-to-air
In addition, you can connect it to your cable service and use it as DVR.
Lastly, it works with satellite dishes, and can playback and record free-to-air satellite channels, which provides an infinite number of choices.