I was a skeptic at first. Now I can say that the Vivid works as advertised. I purchased the coax version. It's hooked up to the antenna feeding the converter box which feeds my LG 55" OLED.
Indeed the change is quite acute: images are more dimensional, astonishing realism, greater color saturation and contrast, improved audio quality. Dialog is so easy to hear. Indeed it makes television viewing a very enjoyable and immersive experience!
@illusion I am thinking of purchasing the HDMI model.