Anyone care to provide an opinion on the iTunes versions? Are the discs better?
Without seeing the setup and being 100%, that may have been an issue with HDCP between the 4k media and your cable/device.
just a small note, i have 4k tv and 1080 projector, and a 4k player, so i borrowed the 4k version of the movie, it was nice on my 55" 4k tv, but failed to project somehow on my hd projector. might be my cable was too long, so i decided to buy blueray version of the movie. works fine both on tv and projector, details are not miles different on any screen below 55" screen to my opinion. voted hot !!!