Galaxy A8 spotted running Android 6 Marshmallow
Around a couple of weeks ago, we saw the same certification for the Galaxy A5 (2016) and Galaxy A7 (2016) run the new version of Android as well, but reports on a massive update have yet to come. Additionally, keep in mind that if you bought your device from a carrier to use on their network, you might be in for an additional wait time, as updates for locked devices need to be approved by the network provider as well.
Such is the world of Android, sadly. However, the FTC and FCC recently teamed up to ask Android smartphone manufacturers why they are taking so long with security updates. So, things may change in the near future.