The Advertising ID field/ Nice of them to think of this, but it doesn't seem that I could actually get this from any of my Samsung TVs, Apple devices, apps?, etc? So while that field is nice and all, without transparency on getting the ad ID, those fields kind of do nothing.

Google TV surfaces this under settings (along with the ability to regenerate it, or remove it)

EDIT: Android also surfaces this information more generally, I just found it under More Privacy Settings -> Ads