Except Samsung's HDR is a scam if you're to believe the other vendors. They may meet the requirements to have their sets labeled HDR they have the dynamic range, but a lot of it is at the bright end of the scale with the contrast right up which means their blacks are still pretty poor.
OLED really is the only replacement for Plasma. Most current TV's pale in comparison to an old VT Panasonic.
I am intrigued as to why other vendors would call Samsungs HDR a scam in all the known HDR formats the baseline is HDR 10 ,Dolby have as the other dominant player put their own version forward in the form of Dolby Vision ( in my opinion the last thing we need is another format war ) Samsungs 8000 series SUHD which I own is fully compliant with HDR 10. I purposely stayed away from OLED and LG after some bad experience with customer service and far more expensive than I feel they need to be.
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