The OLED Association posted an interesting article, summarizing 2015 and giving its projection for 2016 and onwards. So first of all, they conclude that 2015 was a great year for the OLED display industry, with shipments up 53% over 2014 to reach almost 275 million units. AMOLED Revenues grew to almost $13 billion - up 40% over 2014.
The growth was mostly due to Samsung Display's effort to commercialize flexible OLED displays for mobile phones and the expansion of AMOLED customer beyond Samsung Electronics. LG Display also contributed to the OLED display market, and the OLED association estimates the LG sold over 400,000 OLED TVs. They also say that they shipped around 14,000 flexible OLEDs, but they probably mean around 14 million - as that about makes sense for the Apple Watch.