Had another good OLED moment last night. Was playing Diablo on PS4 in the middle of the night with the screen brightness dialed all the way down to 3/100 OLED light and 8/100 contrast. The screen was emitting less bright light than an iPhone or iPad set to its minimum "read in bed" mode.
So relaxing for the eyes! And a perfect way to lull yourself to sleep. Meanwhile contrast and colors still look really good. With LCDs, you can't really enjoy the screen the same way at so low settings (if it even goes so low) because color accuracy and contrast go out the window.
It made the dark environments of the sewers and swamps of Act2 feel even more immersive. I really felt I was experiencing the game in a new way, and I have been through these same areas so many times on a PC Dell monitor and a Macbook Retina monitor.