What does that mean? You can hook and RGB display up to pretty much any microcontroller, as far as I know.

Normally only if the display has its own controller, and you talk to it via SPI, i2c, or an 8 or 16 bit interface.

But those methods are slower and if you're doing a higher resolution user interface, the RGB interface lets you drive stuff like an 800x480 display at well over 60 fps.

Ah, I see. I didn't get that it meant it had a controller built in. Interesting!

They're pretty neat! I've been playing around with one of these lately, it uses the ESP32-S3: https://www.aliexpress.us/item/3256804766379290.html