LGD has another interesting demonstration at CES - a 55" Full-HD transparent OLED. This is an WRGB OLED architecture that offers 600 nits of brightness and 40% transmittance.
It's not clear how close are LGD to commercialization. This is LG's largest transparent OLED ever demonstrated (in July 2014 LGD showed 18" transparent OLEDs).
Samsung Display demonstrated similar 55" FHD transparent OLEDs back in June 2015, and the company will start mass producing such panels soon.