I think the business model will have to come from a company that has all of these assets on hand - print, radio, tv, and web. Content will be shared cross-mediums and will be maneuvered and applied to fit each medium as necessary.

There are a couple companies out there that have this capability - but have yet to set real precedent in this arena.  

Additionally, for those who are not a part of a company that has all of these assets on hand (Time-Warner for example), I forsee a kind of unionizing or networking of companies that have just one or two of a specific medium. They will connect with others along similar veins with related content.

The thing that will change most I feel, is the interaction between audience and broadcaster. And that there actually will be one. This is something that the web medium, especially the recent 'Web 2.0' phenomenon, has brought to the forefront. Not to say that there will be a plethora of more 'American Idols'; television with scripted drama for example will continue, but mediums that augment that script to create an interaction will become standard. See the Heroes franchise for a burgeoning example.

Thanks for the post Frank! It's sure something immensely fascinating to think about, and enjoy watching unfold.