My son and daughter, both in their 20s, are part of a growing group of people who have "cut the cord" and no longer watch video via broadcast, cable or satellite TV. The apartments they live in are among the more than five million U.S. homes that, according to a recent Nielsen study, have "zero TV." That's up from just over 2 million in 2007.

But as the report points out, zero TV doesn't mean zero video, nor does it mean that they never sit in front of a TV set. More than 75 percent of these homes still have at least one TV that's being used for DVDs, video games and -- in some cases -- watching Internet video.

As you'd expect, the Nielsen study found that younger adults were much more likely to live in zero TV households than people over 44. Cost was a factor for 36 percent of these homes, but 31 percent of these non-TV households cited "lack of interest." Just as many in my generation jettisoned their antennas in favor of cable, many younger adults are dropping cable or satellite in favor of Internet TV.

My wife and I don't fit into this zero-TV demographic. We have a satellite dish on our roof to beam in live news, special events like the Oscars and Super Bowl and the occasional sitcom, TV drama or "American Idol" show. But we find ourselves spending a lot less time watching broadcast programs and a lot more watching online video from Netflix (