I wonder to what extent modern electronics, particularly display technologies as mentioned in the article, are dependent by necessity on rare earth metals, and

I wonder to what extent modern electronics, particularly display technologies as mentioned in the article, are dependent by necessity on rare earth metals, and couldn't be replaced with other chemicals. A change I can imagine in the future is towards organic chemicals such as in OLED displays. Although I'm aware that many of those used today are organometalics, and I have no idea what the actual metal resource impact is.