I just updated my iPhone to iOS 10.2 and went looking for the new TV app. I was surprised to not find it on any of my home screens! Instead, it had been placed in my "Apple" folder, where I keep most of the (semi-useless) stock apps. It was even alphabetized correctly, having been inserted between "Tips" and "Voice Memos"!
How long has this feature existed? Does anyone know the history of this happening? Is it something that Apple has advertised?