Several car makers -- Hyundai, Toyota (TM -0.71%), and Honda (HMC -1.52%) among them -- seemed poised to have fuel cell vehicles on the market in two or three years. Tesla (TSLA 2.73%) CEO Elon Musk says fuel cells are "BS". What are the chances he'll admit he was wrong? John Rosevear and Rex Moore give their take in this segment of Motor Money.