“Top executives from General Motors Corp. and Toyota Motor Corp. Tuesday expressed doubts about the viability of hydrogen fuel cells for mass-market production in the near term and suggested their companies are now betting that electric cars will prove to be a better way to reduce fuel consumption and cut tailpipe emissions on a large scale”

They cited cost and the lack of a hydrogen infrastructure as the primary drivers. PEM fuel cells may serve a role where bulk energy conversion is not the primary purpose. IMO the primary problem is the infrastructure…it’s much easier to imagine the costs of the fuel cell lowering to a competitve level then it is to imagine construction of a parallel hydrogen fueling system.