Nice to know thanks, I never heard about that.
Can you confirm if that is for all of the 120hz sets or just the new models. Mine is this 2018 model https://www.whathifi.com/samsung-qe55q8dn/review I got it in the sale last year when the new models came out for £1100.
it looks like 2018 models only go up to 1440p 120hz. Not a limitation of a hdmi ports but perhaps a limitation of the CPUs/processor. The 2019 model do 4K 120hz with chroma subsampling and 2020 models will do 4K 120hz HDR using full rgb