For me its confirming trans-oceanic pre-columbian contact between polynesians and south america. There's really no other way to explain how the sweet potato dispersed across polynesia prior to 1491 (it's a root crop, it didn't "float" anywhere as some have suggested) nor how polynesian chickens showed up in Andean cultures. Given time for more digging on Moche island in Chile I feel pretty certain it will be confirmed.
The questions that develop from there is how long was the period of contact and whether there was 'waves of dispersion" as some have theorized. If the beringian migrations were the primary way in which the Americans were people with the modern American Indian, then Austranesian origins may explain some S. American sites which are older than all known North American sites.
But anyways, I want to hear other mysteries, and hopefully some debate about them.