They're using one of the 600,000 SNP chips, it seems, so that is plenty powerful to derive ancestry information. The they explicitly say that their product shou

They're using one of the 600,000 SNP chips, it seems, so that is plenty powerful to derive ancestry information. The they explicitly say that their product should not be used for trying to divine health predictions, and for most diseases I would agree with them. My guess is that risk prediction for a substantial set of diseases probably won't be done well until 2020 or so. We've only just begun to open the spigot.