This is a revolution. The Cinema 4K App brings not only manual controls like where used to on Windows Smartphones but also a very high bit-rate. 200Mbps to be exact.
Does it make a difference? Oh Yes!
Just have a look at the video and it will be pretty clear.
Note that my LG G Flex 2 is experiencing some bugs with the Flat Profile but the app is still in development.
Compatible phones that I know of so far is he LG G Flex 2, LG G4 and Samsung S6 + S6 Edge.