Here is an example of LG’s OLED off axis view, about 80 degrees off axis. No loss of contrast or brightness. As you may know, each pixel in the 4K display is self emitting, no backlighting required. The LG uses WRBG, but only the white pixels are OLED. The RGB pixels use color filters, so there is no problem with the RGB degrading over time. The white OLED used by LG is rated 50K hours at half life.
