I just picked up the 70inch, finally came in. Did a quick set up, can't really mess with it and run it through all the person tests I do with movies games and streaming. Due to prior engagements, (sigh) one thing that I did notice is that I used my USB with some 4k content and some did not play. I'm not sure but the ones that did not play may have been mkv format. Will post more of my impressions as I have more time with it, I can say that it does produce good blacks from the little that I did watch.