If Boeing uses the term "status message" in a manner consistent with us (or is that vice versa) I'd guess "nothing at all" - status messages don't require crew action.
But they bear a certain relevance, that why they are displayed. "Unusual" status messages could be an indication of more serious messages to come. It is up to the pilot to put two and two together. Just because there is a status message NOT requiring any crew action (for now) is it safe to continue.
For all the armchair theorists/non 777 pilots, please take note what Wizofox says. What he says is absolutely correct. He knows what he is talking about.
What about the 777 pilots and non-777 pilots that disagree? Where's basic airmanship and common sense with regards to safety? Plus, after having seen any type of message about thrust asymmetry (and audible clues) I would have returned. End of story.