I purchased an Apple TV 4th Generation for a Samsung HD TV (720p) I have in my bedroom. Yesterday I watched the first movie on it ("mother!") which I rented from iTunes movies. I really was expecting a better quality resolution at least like the one I get on my cable TV provider's HD channels, but no... I just found it to be too grainy, almost like standard. Maybe something's wrong with the settings? I didn't change anything, it's all default. Or was it the movie itself? I will watch Netflix and Prime Video to compare later on today.