I tried to diagram the logic of your post and see it everything fits together.
If they are going to eliminate "the limitations or costs that may be imposed by a connected network".... what mechanism are they going to use to get the conent to the stations.
Isn't having "enough common, popular content" a problem faced by all distribution methods? Why would that be a larger problem for OTA than it is for a cable network delivery, or delivery by a non-network OTA.. or distribution by Amazon for that matter.
If the current transmitters serving "network stations" are not needed to get stuff to peoples DVRs, why would keep all the toll towers that are a menace to airplane navigation and the life-safety of birds, towers that create such zoning hassles, and must be rather costly to maintain over an extended period of time.
I know your theory seems so logical to you.... but I can't seem to get the pieces of the puzzle to fit together when I try to create the picture.