This, and using aerosolized PFC as a potential method of treatment for patients with lung injuries and chronic lung conditions such as COPD.He made some interesting points about the feasibility of the liquid as presented in the film, and it's got a few drawbacks, but the coolest thing to me, was learning that it had promising applications in neo-natal care for premature babies, who were born at a stage in development where their lungs are underdeveloped. That apparently using the fluid oxygen showed significant improvement in their survivability, and development stages.
But really, one major potential application directly relevant to the "sub-topic" is its potential use for long-term and long-distance space travel...namely, radiation shielding and helping the human body cope with sustained high-G forces. And I'm going with gut feeling here and raw speculation, but it would likely have a place in medically-induced comas (i.e. hibernation) for long-distance travel as well.