Samsung Display demonstrated an interesting new display at SID 2016, the Bio-Blue OLED. This display emits less blue light than a regular AMOLED - and thus should be healthier.
In recent years we heard several researchers state that the extra blue light emitted from LED displays is not healthy - with connections to cancer, sleep problems and other diseases. OLEDs offer a better light emission in that regard compared to LCDs, but Samsung's new Bio-Blue displays are even better.
Samsung says that in a regular LCD, 66% of the light is in the blue spectrum. A regular OLED emits half the amount of blue light (32% of total emission) - while the Bio-Blue display emits only 6% blue light. The display still looked very good to me, and I think that without a reference display you will hardly notice a difference. It'll be interesting to see what Samsung aims to do with these displays (maybe offer healthier tablets for night-time reading?).
In October 2015 we posted an OLED Auditorium Lecture by National Tsing Hua University that describes the hazards of blue light and promotes the adoption of blue-light free OLEDs.