You're really arguing with an Ophthalmologist, a professional trained in the capabilities of the human eye, about this?
We're discussing the sitting distances between a high end display and the capabilities to appreciate all the details. As such, sitting so far away from your tv, or holding a cell phone so far away from you, you will not be able to distinguish SD or HD all that well. Not sure what you don't understand here.
And you continue to miss the central point of this discussion. We realize from your numerous posts across multiple threads that your a pixel whor..., afficiando, and that you haven't met a resolution high enough yet for your personal standards. What's being repeated explained is that yourself withstanding, the vast majority of people don't hold their mobile devices that close to their face, or watch TV that close. Pdqgp explained it perfectly--you don't see couchs and chairs placed less than 6' from their large screen televisions because, 1) it looks ridiculous, and 2) people just don't sit that close to their TVs.
Yes, I like a high resolution display. Like other people may be more focused on the OS, a phone, they may be an audiophile, etc. We all have an area that we may be more focused on than others. Maybe if I don't care too much about a certain technology, doesn't mean I oppose the advancement of said technology.
1080p and Blu-ray are perfect for the moment, I'm not complaining about that, but as technology advances and 1080p content has to be upconverted to a 4k/2160p display, it will ultimately show it's flaws. Why not continue to advance the displays?
Lets be honest here, the vast majority of people that hold their phones that far away, or hold a 10 inch table like 30 inches away? And sit so far from their TV's, don't care about the picture quality and this is not meant for them. Plain and simple. They automatically assume everything they watch is of high resolution anyways. They read the label and that it. But simply because they don't know what they are looking at, doesn't mean those that will enjoy it should be deprived of the possibility of owning it.
Most homes don't have a proper sitting distance from their tv's, no one is arguing that. That doesn't discredit that a higher resolution display will be appreciated by those people that sit at a proper distance
If you need to use a device that close to your face to realize the benefit of the higher resolution, it's not really a benefit and thus a waste of resources. If most people aren't going to see the benefit, it's unnecessary and IMO, foolish to include it.
If that's the argument, then cell phones should have never exceeded qHD, because the average person won't even care to see a difference. Heck, most people don't even use 4G LTE to it's full advantage. I mean, who really needs 30-50mbps on a cell phone? The average person doesn't need anywhere near that amount of speed on a cell phone. So we should go back to 4G with that logic. 7-9mbps is perfectly fine as most people don't utilize such crazy speeds and it's pretty foolish to have access to it.
And we haven't even discussed the fact that there is very little if any content available at that higher resolution.
The UI will be optimized to 2560x1440, videos can be recorded in higher resolutions, and more content will be available this year.