What is the basis of your question? Are you interested in why those particular changes have not yet occurred? Or are you looking for the answer to why further error reduction methodologies have not yet been incorporated into our cellular mechanics, as mentioned by brianchu?
Exactly. Once a method to significantly lengthen human lifespan is found, the challenge then becomes: where do the natural resources come from to support such an expanding world population. When that day of great scientific discovery arrives, we may all be on a calorie restricted diet, whether we choose to or not.
I agree there are concerns with readability at certain LCD viewing angles. I often test my projects on a range of "run of the mill" monitors and more often than not I find that the contrast is horrid (at any angle) although it looks perfect on my setup. Thus, I usually increase styling contrast more than what I feel is necessary, in order to ensure an acceptable experience for all users.
