Huh? Any TV set sold the last dozen or so years is digital capable, and digital sets have been available for over 20 years. If you have reception of the "main" channels you can therefore tune all the subchannels.
My situation: brick apartment building, no outdoor antennas allowed, only exposure is from south-facing windows. With an indoor antenna, channel scan brings in WTNH New Haven and its subchannels and nothing else. All the other TV transmitters are to the north and west between 20 and 30 miles away. There must be a significant number of people in this country in similar situations, and I'm sure the FCC and the broadcasters knew exactly what would happen when the digital switch was pulled. OTA has become an afterthought, even with the subchannels, and I don't think the television industry is one bit concerned.