[Prophesy]

From what I've heard its stats that are going to be incorporated in a future update.

However,
this has been the case for ages now, so, who knows.

I think I heard a theory that the concealment rating will come into play when you are jailed for a crime,
a high concealment rating will allow you to hide your illegal gear from the wardens, thus getting a lower jailtime than if you were "caught" with it