moovtune
Stunt Coordinator
Isn't it true that when watching a blu-ray on a 4K TV, the TV set is up-converting the 1080p to 2160 automatically because it's the TV's native resolution? Because of this, I decided a year and 1/2 ago to stop buying 4K discs that were just up-converted from a 2K master.
At first I bought an occasional 4K title anyway because it sometimes had an Atmos mix and the blu-ray didn't - but then my disappointment with so many of the Atmos mixes - having them sound no better than using my processor to upmix the 5.1 or 7.1 to Dolby Surround or DTS Neural - caused me to go back to just the blu-ray, unless the 4K had a 4K master.
At first I bought an occasional 4K title anyway because it sometimes had an Atmos mix and the blu-ray didn't - but then my disappointment with so many of the Atmos mixes - having them sound no better than using my processor to upmix the 5.1 or 7.1 to Dolby Surround or DTS Neural - caused me to go back to just the blu-ray, unless the 4K had a 4K master.