I find the ‘future tech’ framing of this confusing. These have been available as commercial displays for at least 8 years, albeit with some availability issues

I find the ‘future tech’ framing of this confusing. These have been available as commercial displays for at least 8 years, albeit with some availability issues on and off as the mfrs retool and reconsider the packaging. I just worked on a project that uses these as the windows of an augmented reality bus tour. The article also fails to mention transparent LCD, which is a closely related cousin with inverse properties: where transparent OLED is emissive and is transparent where it receives black signal, transparent LCD is non-emissive (needs a backlight) and is transparent where the signal is white and opaque to a greater or lesser degree where the signal is black.