That's just sales people talk. There are many articles about this like https://www.google.com/search?q=cnet+all+hdmi+cables+are+the+same
I pick up the Amazon Basics that do it all for 7 bucks. In the stores they push 50 to 100 buck cables (rip off.)
I use AT&T Uverse cable company.
(Not Direct TV).
I already have UHD HDMI cable connected to my TV. Not sure if that cable is HDR compatible. I bought a new Samsung UHD TV with HDR. Not sure if it is also 4K. The salesman recommended buying a new HDMI cable that Is HDR compatible, so I bought the cable.
The guy from the Geek Squad came and installed the new TV. I showed him the package for the new cable. Not sure if he noticed it is HDR compatible.
He said I don't need it and I should return it, that the old one is good enough. He said the UHD is inside the TV and I won't need a new HDMI cable unless I buy a 4K DVD player. I forgot to discuss the HDR aspect of the new cable with him. Not sure if that matters.
Should I return the new HDMI cable, or have it installed to replace the old HDMI cable?