I live in the bottom of a little valley, and I'd need a hundred foot tower to get more than two TV stations.
In my state, it's illegal to have a tower so tall that it could fall outside your property line. My property isn't two hundred feet wide, so no go.
But I ditched Comcast anyway and got Verizon instead. Verizon sucks too, but marginally less, and the FIOS technology is nice, at least, even if the provider isn't.