The Big12 is not dead, as the premise of Blum's article, a lot can change over the next 6-7 years. That said, no matter what changes occur over the next 6-7 the Big12 will need to expand if it wants TV Rights revenue to remain in the ballpark of the SEC & Big10. The current Big12 has too many small TV market programs, with smaller fan bases. Also any technology available to the Big12, will likely be available to other conferences.
Corporations that dominate the marketplace today, will likely dominate the marketplace in 6-7 years, as they will protect their content & delivery franchises. AT&T already owns DirecTV and now wants to buy Time Warner. No reason Disney (ESPN) can't go out and buy a Netflix, Twitter, etc. if it enhances delivery of their content.
Regardless if the future is similar to today's sport channel dominated market or a future of twitter, netflix or whatever streaming entity exists- eyeballs will still be critical. More accurately, it might be eyeballs who are willing to pay $250-$500/year to watch their team/conferences games.