A larger matrix like this 16 x 16 x 16 LED build, has a total of 4096. This would be a nightmare to drive with plain RGB LEDs, even with cunning multiplexing, but luckily you can buy indexable ...

RGB backlit TVs are coming, and you're going to hear a lot about them in the next few years. They're the next big development in LCD TVs, and they take the technology used in the best mini-LED TVs ...