Hydrogen has a looooow power/density compared to JetA1, meaning it is very weak. It also requires very special storage, safety, and infrastructure issues.. Remember... the X-33 could not get a composite LH tank to work
We will see fuel cells in cars but for jet turbines there are other options. The only one that I can see as being practical will be biodiesel. From what I understand standard jet turbines can work rather well with some minor modifications. Can somebody shed more light?