Re: Has anyone switched from the s4?
I made the jump from S4 to Moto X. The only thing that I miss about the S4 is the larger and higher-resolution screen. The navigation bar (i.e., on-screen buttons) on the Moto X actually make a significant difference in screen real estate. The S4 has a 5" screen and the Moto X has a 4.7" screen. Now add the navigation bar, and your effective screen size becomes 4.375". That's a very big difference, and things like my Pure Calendar widgets are looking extremely compacted.
The resolution also makes a huge difference. Lot's of reviewers discount this with a waive of the hand, explaining that the difference is nominal, some saying that the human eye cannot tell the difference. Not true, at least not for me. Text is fuzzier and grainier and the outlines of icons looks less sharp.
The Moto X also has this characteristic where it appears you are looking at an image projected on paper. You can see this textured surface to the pixels that looks like soft sandstone or construction paper, whereas, the S4 pixels look like they have a shiny crystal-like surface. This is a difficult phenomenon to explain, but you can really see it when the screen is primarily white, and especially when you compare the phones side-by-side. I think this is the nature of this screen technology. While the Moto X offers much richer colors, blacker blacks, and is brighter when necessary, it's grainier. I would analogize the screen difference between the S4 and the Moto X to that between an LCD versus a Plasma. I use only plasmas in my house because I prefer the richer (and more natural) colors, deeper blacks, and contrast (e.g., Kuro Elite). But, for reading crisp clean text, I go with LCD on all of my computer monitors. By analogy to the Moto X screen, if you walk right up to a plasma, you can see strange texture ("dancing ants") and other abnormalities that you don't see on LCD.
That all said, I've now used my Moto X for 4 days, and I have absolutely no issues with the screen. The differences I noted above were especially apparent during the transition between S4 and Moto X, but now that I am into "day-to-day" use, the Moto X's screen is absolutely beautiful -- no complaints. I should note though, when I prepped my S4 for sale yesterday, I was again really captivated by the big and high-resolution screen.