I'll throw this out there:
MOTO X Engineer on Phone Specs
That leads me to the criticism about the screen resolution. Why did Motorola decide to go with a lower resolution? I mean, it seems like every other high-end smartphone, including the new LG G2 that was just introduced today, has a 1080P screen. And when it comes to pixels per square inch, the Galaxy S4 has the Moto X beat.
Arshad: First of all, what Samsung has done with the GS4 screen is not true 1080P. Instead, Samsung is using a PenTile display. Each pixel is made up of three-color sub pixels. It's missing one of the pixels. We are using a true RGB pattern custom display that gives true color reproduction without wasting battery life.
Samsung is using a graphics processor, but they're using it the wrong way and their performance is actually worse than ours. They are burning more battery life. In the case of HTC, they're using an LCD screen, which is simply an inferior technology.
Also, the human eye cannot discern resolution beyond 300 pixels per inch. And we exceed that. So the eye can't even see the difference. But the human eye can see big differences in color saturation and reproduction. In fact, I'd say that is even more important than resolution. So we decided to focus on that aspect instead.
While I agree with him that the Pentile layout of the Galaxy S4 means that it doesn't look quite as sharp as 1080p RGB stripe display, the 300 ppi statement isn't true.
The scientific calculation of what a human eye can resolve at its best is 573 ppi at 12 inches and 458 ppi at 15 inches. That has been quoted in numerous articles I've read over the last few years. That's what a scientist come up with to show that Apple's "retina display" is a misnomer.
And the colors on an AMOLED display are atrocious if not calibrated to SRGB, which the Moto X isn't. The S5 offers Cinema mode which is almost perfect besides the gamma being a little off.