run a long hdmi. when you inevitably upgrade the apple tv your next device wont have an optical output and youll need the long hdmi anyway. the 4k hdmi you have is rated for 18gbps and is fine.
HDMI or Optical for the long run to the projector?
Going from Apple TV 4K into a 4K Sony projector. I can use an HDMI cable from the projector the DAC or I can locate the Apple TV next to the projector and use an optical cable to go to the DAC. The long run is about 20'. Is it better to use HDMI or Optical for the long run? Thanks.