Not price competitive with fossil fuels, but then not much is - hard to beat ‘mega joules for free*’ as it were.
It’s hard to compete with “let everyone else in the world pay for the true cost of this energy”.
That’s what makes fossil affordable and why we need carbon taxes right this second.
Our current spike in natural gas and oil prices is something of a dry run for what carbon taxes would look like. So far it doesn't seem like the approval ratings of the governing party can survive it.
For aviation, sticking on a carbon that outweighs your hydrogens by almost 8x gives up a huge efficiency advantage. The efficiency advantage overcomes inconvenience of handling cryogenic LH2. My bet is the tanks will be nacelles slung under the wings alongside the engines.