Sony launched a new OLED microdisplay, the ECX339A, which has the world's smallest pixel pitch (according to Sony) at 6.3um. The 0.5-inch microdisplay's resolution is 1600x1200 (UXGA) and it supports a frame rate of up to 240 fps. The maximum brightness is 1,000 nits.
Sony already started sampling this new microdisplay in January 2018, and mass production is planned for November 2018. The price of each sample is ¥50,000 - or about $460 USD.