8K moves up to 7,680 x 4,320. That means there are 7,680 pixels on the horizontal axis and 4,320 on the vertical. It's likely that you'll have Full HD up to 40 inches, 4K up to 60 inches and then 8K above that in the future, so 8K only really applies to those bigger sizes - if the TV is too small, the pixels will be too tightly packed for you to be able to see any difference in the image. As detail increases you can sit and marvel in front a huge image that feels like it's engulfing you. It's here that big 8K TVs have a natural advantage, because it increases the angles that light comes into your eyes.