I made this post previous in the HTC 10 thread.
#133 However its relevant here.
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"There is an assumption often used that amoled is best and yet other than maybe Samsung's flagships in my own experience owning so many others, amoled screens are more often than not very flawed. Color accuracy and calibration is often very much off compared to a very good LCD and moreover the white point is usually very much off point with majority of Amoled screens returning a very yellow hued screen. Some are worse than others yet all seem to exhibit this yellow tint (actually even Samsung's 2015 flagships had a pale yellowish whites, especially in basic mode which used to provide the more realistic colour balance previously). The Nexus 6P, yellow tinge, The Moto X Force, yellow tinge etc .... It just seems to be a factor in Amoled screens and personally i really dislike this warm white point. I have had to resort to using screen calibration apps (screen balance) to fix the yellow, but even then they still more often than not, don't match the clean neutral whites of a good IPS LCD.
Likewise other than Samsung, who pushes screen brightness v.high, most Amoled screens are very poor in outdoor sunlight compared to LCD screens. A 2k screen that you can barely see the contents on whilst shooting photos is quite often a frustrating experience.
An example here is the Moto X Style which people complained had moved to LCD and yet compared to its sibling the Moto X Force it actually has the nicer calibrated screen with the force being very yellow, and outdoor visibility is much better on the Style's LCD panel than the Force's 2K Amoled.
So yeah, the technology is far from perfect to declare it automatically better because there are plenty of excellent LCD screens that offer better viewing experience than majority of Amoled screens outside of the Samsung flagship models."
So fingers crossed the iPhone 7 if it does go amoled - gets a one of samsung great one and match their metrics.