If it’s truly just like the methods astrophysicists use for transit imaging, you might even be able to do some funky stuff like monitor invisible gasses. Could potentially be revolutionary for things like fume safety and viral spread tracking, among other uses. Might even be able to analyze liquids in a container without having to touch the liquid (the name for this type of testing evades me at the moment)

I believe it'd be pretty wonky coloring, or at least it could be, since it'd be capturing snapshots of individual frequency responses. If something is visibly green, reflecting across most of the greenish areas of spectrum, but happens to absorb the exact frequency of the laser, it'd appear black when imaged this way. Or at least not green.