I agree, it can be confusing, especially when manufacturers put their own stupid names to a feature that they all basically have......we will be getting another one shortly with the implementation of what is commonly known as HDR-10+, which basically a codec that tells 4k TV's/Displays how bright each scene in a movies is supposed to be, and will change with each scene seen, sort of like a auto gamma processing.
Currently Blurays and other 4K material uses standard HDR-10 codec, this tells the TV what the brightest scene in the movie will be, but it only tells it once, at the beginning of the movie, so Dark scenes can be washed out and bright scenes can be searingly bright.
Samsung made it as a open source codec free for all manufacturers to use, but LG says it's building it own processing into it new TV's and Sony doing something similar, so there is a totally unnecessary and confusing format war going on, you would have thought they learned their lesson with all the previous ones, with Bluray V's HDDVD being the last major one 11 years ago.

Personally, even though the PS4 pro is a decent Bluray disc player, I much prefer the upscaled to 4k Bluray images produced by my Panasonic 4k disc player, but then again I'm a bit of a tech head and have my own equipment for calibration of the TV's and projector.
You would be amazed to see just how far out of whack every new TV is compared to a calibrated one, even the most expensive ones, well worth the outlay to buy a meter and the software to calibrate your own displays IMHO.