So you've gone from saying no one can see the difference to now saying it's unhealthy to view displays at any closer distance, not even taking into account the different types of displays that are made and their differing characteristics, such as their normal brightness levels and the differing intensity of light emitted.
If you're going to argue one point then at least stick to it, otherwise I'll be quoting your posts when Apple increase the pixel densities of their screens and you love how clear and nice it looks.
Apple's display already are clear and nice at about 330 PPI.
Everything else you said is just an attempt to justify your purchase as "better" than an iPhone ....