What do you think it could mean? Sounds rather like some sort of auto-scaling item that will scale with your average ilvl or something? Not really sure, but it's an interesting little nugget to ponder.
For those who don't know what I mean, check the latest build and look at the Timeless Isle trinkets, they have the prefix "Timeless" in the same place as you would see "heroic" or "thunderforged" for example.
Speculation?