Hyundai, Toyota (NYSE:TM), and Honda (NYSE:HMC) all showed hydrogen fuel cell vehicles last week, and all said they will have production models for sale soon. Hyundai's will arrive next spring, and the lease includes free hydrogen fuel. Is this the next big thing in green cars? The Motor Money team of Rex Moore and John Rosevear take a closer look at the new models and when we can expect to see them on the road.