When you have a good signal, OTA is usually the best image available. There are many variables, however, and RF over the air can be unpredictable unless you have a very good antenna relative to the available signal. I have Cox cable and it is pretty good, but Fox is not the best under any situation, including OTA. I don't see much difference unless there is a problem.
The reality with OTA is that many people are in a situation like me where there are transmitters in different directions. This means you have to go with an antenna that is not directional, or use a rotator on a higher gain directional antenna. This means that some people will have to choose which channels they orient the antenna to or sacrifice channels at a distance with a less directional antenna.
The physics have not changed and there will always be the trade off between gain and directionality, but the options on multi-directional antennae have improved in recent years, so I am going to give the current products a fresh review. I fully expect to find that there may be marginal improvements in the indoor antennae available but as I said, the physics remain the same. A bigger, more directional, and higher antenna will get you more signal. You can only do so much indoors with the signal that is there. But many people can get some good options with a simple indoor antenna, so we'll see what is currently available.
