People all over the United States look forward to the playoffs leading up to the Super Bowl. The Super Bowl is one of the largest grossing sporting events to occur annually. If college football would go to playoffs rather than bowl games, the colleges and teams would gain greater exposure and interest.
Having a true playoff wouldn't increase exposure. The college system is already closely monitored by professional scouts and coaches. There are loads of media covering the games on tv, radio, internet and in print. A playoff would possibly settle the question of a true "national champion", but there are few collegiate sports that receive more exposure than college football.