
Due to the construction of Samsung's AMOLED displays and its use of the diamond pixel matrix, green subpixels outnumber blue and red subpixels in a 2:1:1 ratio. This has led to users noticing a green-ish tint to the screen and skews the color accuracy on the GS5. Now even though the Galaxy S5 LTE-A features the same kind of AMOLED display, the bump to the 2560×1440 resolution helps in addressing the green-ish tint. Notice below that there is a very real difference in color accuracy between the two handsets.
Aside from this, the increased power consumption of the screen appears to be marginal and with that makes a strong case for Samsung being the premiere display manufacturer. One gripe may be that the global Samsung market is on pins and needles awaiting the point when such a dazzling display will be available to all; here's hoping that there's not much more waiting.