I remember sitting very close to the television as a child and seeing the image was made up of tiny coloured dots, each of which broke down into miniature vertical strips of red, green and blue when I looked even closer.
Back then, a television was a bulky box that sat on its own stand. Today, screens are so thin they hang flat on the wall.
At the same time, picture quality seems to improve every few years. Manufacturers promise sharper resolution, brighter images and richer colours, with labels such as HD, 4K, 8K, OLED and QLED.
But can television images really keep improving forever? Or are we approaching the limits of what our eyes can actually see?
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