From one atheist philosopher to another:
This is significant because the standard atheist paradigm is committed to physicalism. And if physicalism entails eliminative materialism (i.e. consciousness is an illusion), then that's a defeater for the standard atheist paradigm.
In principle, an atheist can be a substance dualist, platonic realist, or even an idealist, but atheists resist that for good reason. Physicalism, if true, automatically disproves Christianity at one stroke. No God, angels, demons, souls, precognition, or miraculous action at a distance.
Conversely, opening the door a crack for discarnate minds is a divine foot in the door.