I have posted this a few times before, but it remains true. Just go into virtually any newer (15 years or so) subdivision of homes. You will be hard pressed to see a single tv antenna. Only satellite dishes (and of course cable tv connections).
The enthusiasts like us care about this, the vast majority DO NOT. It's not going to change, and in fact it was not until the satcos were able to offer locals to almost everyone that they mounted any serious subscriber attack against the cablecos. Most people are just very happy to have one source.
On a related note - I would wager that most HD subs don't even know about sub-channels. Why? As stated, most get their signal from a pay provider, and most pay providers don't put out sub-channels. You can't miss somethig that you don't even know exists, can you?