Hydrogen sounds good in theory. When you start to investigate it a bit, you uncover the problems with it that the media and govt somehow don't bring out all that often.
The biggest issue is the specific energy associated w/ H2. Yes you can burn H2 in an IC engine, or a turbine, or a water heater, your bbq, space shuttle, etc. The energy density of gasoline is about 9.7kWh/l, where Hydrogen is around 2.6 kWh/l (liquified H2) for compressed H2 gas is even less 0.75kWh/l. (numbers I just got doing a quick web search)
So on rough estimates, assume you have a truck with a 25 gallon gas tank. To have the same "range" on a tank of Hydrogen, you'll need approximately a 100 gallon liquid H2 tank.
Think about what 100 gallons of liquified H2 might do if that tank were in a wreck on the highway.
I'm not trying to discount the importance of this research and definately recognize that we need to be shifting away from fossil fuels much more quickly than we are, but I doubt that any of us here will see hydrogen as a truly effective replacement fuel. There are lots of other alternative fuels to be explored.