Does anyone actually know the difference between LCD and SLCD?
From what I can gather, SLCD is a brand of LCD displays?
SLCD is a Sony LCD with 18-bit color depth (actually - could be Samsung or Sony and could be full 24-bit color, but right now, it's Sony that's supplying them for mobile phones and as typically the 18-bit flavor).
LCDs are simply like having little valves or apertures at each subpixel that open or close to allow more or less light to pass through a colored lens or polarized plates scheme.
There are over a half-dozen actual LCD technologies - this wiki wrapup is old and outdated, but substantiates the idea -
TFT LCD - Wikipedia, the free encyclopedia
Each technology is quite different in its response time, off-axis viewing, tendency to look washed out, tendency to black crush and so forth.
Saying LCD is like saying "Italian food" - it doesn't say much by itself and saying that all LCDs have
Problem X is like saying all pizza is difficult to eat with a spoon.
That's exactly why I said "Steve's standard". Steve's "Retina" standard is 300 PPI, which Apple Retina display exceeds at 326 PPI. But the real standard is around 477 PPI, where the pixels are truly invisible to a healthy human eye.
So the Retina display isn't truly "Retina" until the eye is about 1.5 feet away from the Apple Retina LCD.
I have 20/20 vision and I can see the pixelation in my brother IP4.
Your eyes exceed the norm by far, and resolution in cycles isn't measured by 20/20.
As far as PPI - you're on the right track, but it's not a single number - as you mention - it's a relative number with respect to distance from the viewer.
Apple's original 480x320 was too coarse. They doubled both dimensions to ease software updates - that's the real reason for the retinal display.
Taking TV content from SD to the various HD schemes requires a piece of software called a scalar.
Betcha dollars to donuts that the whole qHD thing is to simplify math and try to increase quality for converted HD material.
How you'd care about those things on a phone-sized display depends on the user's eyes and type of use.
I find the less saturated colors on my LCD more appealing to me - but remember, my phone has had no less than 3 different displays in its production lifetime, so you can't even take my statement as model-based.
Until Android phones come with necessary adjustments beyond brightness - and that means
at minimum contrast and gamma, the color comparisons between any technologies are anecdotal.
Look at enough SAMOLED phones side by side - ditto for LCD - and you'll start to see the unit-to-unit variations until you're unsure of the type-to-type variations.
In my opinion.
I don't understand why Moto didn't say that, instead of just qHD. They make it as a feature, which I thought was the type of screen being used, not its demension 
