Leo asks:
Are there hints that any of the major over-the-air networks have plans to
broadcast 3D content? I know every TV station has sub-channels. I would
think they would make use of the spectrum to crab more viewers like me.

Not really, in fact AT&T recently announced that it was going to stop its sponsorship of ESPN’s 3D channel.

For the time being service providers will probably continue to offer selected content in much the way Comcast does with its channel 337 (in the Northeast).

The networks will continue to offer programming and in the world of home video powerhouse media companies such as Disney will continue to support the format with new releases this fall and winter.

In th TV station there have many sub-channel. I don’t know about the broadcast 3D content.