The ATV properly recognized the Samsung set as a 4K 60fps HDR10 device and set the default output to that (versus when I have it connected to the Sony set which it properly recognizes as a 4K 60fps Dolby Vision capable set and auto changes its output to support that). I confirmed the output change via the menu prior to playback as I was curious if it was smart enough to do that or if I'd have to manually change it.