Hydrogen's Achilles heel is its crappy volumetric energy density. Even if you get the hydrogen to the point where you literally can't compress it anymore and it liquefies, it takes up 4x the space of the equivalent energy amount of gasoline. This doesn't include added weights from tanks, bigger engines, etc.

So the people behind this are not wrong that if we're going to have a hydrogen economy we have to confront this volumetric density problem for motor fuels. Even if somehow they lived up to their billing, a vehicle designed to run on alane would suffer the same shortcomings as ethanol- still inferior to gasoline in multiple ways.

Are we going to have a hydrogen economy? No. Even if this alane wasn't snake oil and completely lived up to its promises, hydrogen would still be more expensive to fill your car with, and it wouldn't work as well as, gasoline.

"But, but, but.. what about when we run out of oil?" This won't solve that problem either. We can and will make gasoline from natural gas and/or coal if that ever happens, which it won't.