Can DeX output 4k HDR?

[bobbob1016]

I've seen some dongles that say they do DeX, and have 4k output. I've also heard that 4k is an option with Oreo. Can anyone confirm if the S8/S8+ can *output* HDR or DolbyVision?

 

[wunderbar]

the official changelog states that Dex can now output in 1440p. No 4k, or any kind of HDR standard.