The only thing I would love to know, now, is who makes our oled display.
I do believe it is likely one of Samsung's AMOLED displays, possibly the same model or similar to that used on the Galaxy S4, it does appear to use the same Samsung Pentile subpixel layout and have similar characteristics, i'm fairly certain that Samsung have supplied just about all of Nokia's AMOLED panels over the past 3-4 years:
[I cannot post links but look at page 3 of the gsmarena Lumia 930 review]
An in depth look at the characteristics of the Samsung Galaxy S4 display by Erica of angeloftech website: [I cannot post links but look at Erica's "Galaxy S4 ALL YOU NEED TO KNOW: Part 2 (Displays)" video on Youtube, searching that exact text should get you to it.]
Erica notes that each particular Samsung AMOLED panel tends to have varying qualities as far as image quality, accuracy and display uniformity goes also noted is how bad colors on many devices get when you drop brightness below a certain level (around 50%), many people came across this throughout Samsung's Android devices with AMOLED panels, and many apparently had success just swapping them for replacements until they were happy with what they got, or simply getting a refund and going elsewhere (which tended to be nowhere if you wanted android a few years back).
edit: seems wpcentral is using a full name instead of what I thought I set as my username... don't suppose there's a way for me to change that?