At IFA 2015, LG Display presented a new double-sided 55" OLED prototype that is aimed towards commercial or retail applications. The whole displays is just 5.3 mm thick and weighs just 12 Kg. You can see it in the video below:

The video also shows LG's 55-inch "wallpaper" OLEDs which were first unveiled in May 2015, which is really impressive...

Kyulux - Hyperfluoresence OLED emittersKyulux - Hyperfluoresence OLED emitters