There are only so many 6-6 or better teams to go around. Now 12 make the playoffs, which include some of the major bowl games obviously. But it takes out about 6-8 teams that otherwise would go to the "Cap One" bowl et al. That means lesser teams will go to what were fairly decent bowl games. And fewer teams are available now for the Poulan Weedeater Boise Idaho Potato Bowl, and interest in those really minor bowls will be lessened, a lot I suspect. They will be "NIT'd" into oblivion.
ESPN won't throw money at a December 15 bowl any more I suspect. It'll be either "Playoffs or Bust" for most programs. So, your team went 10-3 with a win in the Cap One Bowl, it will mean less than it does today I think, and a win in the Bluebonnet Bowl won't be worth the money spent to play there.