First I never claimed you wouldn't be able to read your mail or browse the web... of course you can. And I've never said it had anything to do with apple not using it. Samsung and HTC both use SLCD displays and SAMOLED displays in their devices FYI. That doesn't change the fact that pentile sucks. It cuts out green sub-pixels because the human eye is least susceptible to that color. Just because you may not have good enough vision to notice, does not mean the problem is not there. You just aren't going to get correct color reproduction with sub-pixels like this:
Image
For comparison sakes, here is the arrangement of iPhone screens:
Image
Then you have the entire argument of whether each "pixel" in a pentile display is actually a real "pixel" because it doesn't contain the standard 3 sub pixels (RGB) for each pixel. Some claim since it reduces the number of sub pixels by 1/3, that the claimed resolution should also be reduced by 1/3.
Sorry, but I see absolutely no benefit to having a pentile display for a consumer. All it does is allow companies to boast about the high resolution of their device basically deceiving customers by making them think they have a higher resolution than the competition.