Ok, short version of story. I loved my redmere active slim cables but when I went UHD, they did not work. Since then I have been looking for something slim and flexible, and found these last week. They have only been out a few months, and are $20 range not $5 range
So, for anyone wanting a slim cable with UHD, at least we have an option now.
So now we got HDMI 2.1+? Good Luck unless its a short distance!