Hydrogen as a storage in vehicles is stupid just from the energy density and efficiency point of view. Nevertheless everything else involved. To run a hydrogen-electric car, you get some best-case efficiency of around 20-30% of the power from the electric power plant, which means wasting as much energy as on internal combustion engine cars. A similar figure on a battery-electric car is 70-80% efficiency of powerplant to moving the car. The electric car itself is also much more energy-dense and allows for bigger power.

This basically means the hydrogen-electric cars will within the next quarter century be viewed like steam powered cars are viewed now; by far long obsolete and impractical.