Update: We discussed this with Nuovoyance's VP, he explains better why PenTile displyas lasts longer...
Some people really dislike Pentile displays, but Samsung keep producing AMOLED with PenTile - even in their flagship devices such as the new Galaxy S3 (which sports a 4.8" 1280x720 HD Super AMOLED). Today we hear that Samsung says that one of the major advantages of PenTile AMOLED displays is increased lifetime.
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In PenTile displays, there are twice as many green subpixels as there are blue suxpixels. Blue OLEDs feature the lowest lifetime, and so Pentile displays "tend" to last longer, according to Samsung. In any case, as the resolution gets higher, it's getting harder to actually notice the "fuzziness" caused by the Pentile Matrix...
Comments
They could also use variable pixel sizes with full RGB pixels so their argument is BS.
You can't use "variable" pixel size with "full" RGB pixels. It's one or the other.
Though I fully agree that you can change the sub-pixel sixe in other layouts, not just Pentil Matrix.
It is all about emissive area of blue. If the blue-sub pixel area is enlarged (as you can see it is from the Pentile Matrix photo), then blue sub-pixels can be driven at lower luminance for the same light output.
OLED lifetime (LT) is inversely proportional to luminance (L) with a power law of approximately 2. If you double emissive area of blue, required luminance is reduced by a factor of 2, and lifetime is extended by a factor of 4.