Hydrogen is stored in pressurised tanks which are heavy. And pressurised tanks are tube-shaped, so you can't really use the wings as fuel tanks.
Put people inside wings and hydrogen in the fuselage? Could work for a big enough plane.
I'm imagining a plane this big and it's awesome. I can already see the Michael Bay film. A little impractical right now though I think we can all agree. I think by the time hydrogen becomes feasible for planes, the landscape will likely be wildly different.