The Nano is also a great choice when your code is pretty large. Since it has more usable flash memory than the Micro (30 KB vs 28 KB), it's better at handling long sketches. On the other hand ...
These nano-PeLEDs feature pixel lengths as small as 90 nanometers, enabling an unprecedented pixel density of 127,000 pixels ...
Researchers at Zhejiang University and Cambridge have demonstrated ultra-high-density LEDs achieved using new materials.