[quotemsg=15186982,0,1895824]Since Samsung crippled OLED with the Pentile "invention", my interest in it has been waning...[/quotemsg]
Pentile fixes two major problems with high-density RGB stripes.
1. RGB subpixel rendering is asymmetric. A 1280x800 display ends up being the equivalent of 3840x800 with non-square subpixels. You end up with 3x the subpixel resolution in one direction that you have in the other. And if you tilt the display from landscape to portrait, you need to do a completely different subpixel rendering method for fonts. Pentile subpixels are symmetric horizontally and vertically, and the same rendering method works in either direction.
2. The color resolution of your eye is not the same in red, green, and blue. Green is substantially better, red mediocre, and blue bad. With low-density RGB pixels this isn't a big deal. But with high-density (high-PPI screens like retina) you're basically wasting subpixels on blue and red resolution your eyes can't see, while green resolution is still not sufficient to fool the eye. RGBG pentile is a closer match, and can fool the eye in red, green, and blue while using fewer addressable pixels.
Basically, once high-PPI displays become standard, pentile is going to take over.