yeah, too bad none of that matters, because at 720p on .7 inch screen, no matter how close you eyes are, you wont be able to destinguish each pixel..

if i put my eye up against a object, im still not going to see a sub atomic particle. silly comparison put still works. 

when pixel density is that high, it doesnt matter. show me another .7 inch oled screen with a 1280x720p resolution, and then we can talk. 

if you wear these things and are able to make out the pixels, the you deseved to be worshiped, for you have suprhuman eye sight, and will have no use for microscopes

The size argument I am talking about doesn't have ANYTHING to do with the particular focus, I'm talking about the same reason we can see objects under a microscope that we can't see with the naked eye. It's the biological threshold of what we can see due to SIZE. There is a LIMIT to what the Human Eye can see, and the size of these individual pixels are far beyond that limit, regardless of how close to our eye it is, your formula, whether you like it or not, does not address that.

Also, you would be getting the equivalent of a 750 inch screen at 20 meters. You do in fact realize, that at that size, it will take up your entire field of vision, correct? Thats already been stated that this takes up, even most peoples peripheral vision, therefor giving the EQUIVALENT. You need to start understanding biology, and the limits of the human eye to understand what I'm talking about. Both Biology and Tech come into play here, you need to start addressing both.

Your comparison is good, but sub atomic particle are a lot smaller then pixel on a .7 inch 720P screen. When im saying seeing the pixel, its more about being able to tell the difference between 720P and 1080P. You should only be able to see the pixels (black square) on white background.

Its a basic principle really, since its the pixels that compose the image, you cannot give the illusion of  a bigger screen without giving the illusion of bigger pixels, its just impossible. Whether your projecting the image or just getting really close to it doesnt matter. Whats important is how much of your viewing range it takes. Just think about looking at 3 different 70 inches TVs from 20 meters away, will you be able to tell which is 420P, 720P and 1080P? No! But at 2 meters? Yes, easily. Same thing goes for 3 different .7 inch screen. At 20 centimeters will you be able to tell which is 420P, 720P and 1080P? No! But at 2 centimeters? Yes, easily.

Because you've seen a 0.7 inch 720p screen right? I suggest we all just wait and see how good this thing actually is with our own eyes, because so far, its been pure speculation. I however, still firmly hold my ground on my standpoint, based upon the articles I've read, and my own personal knowledge on how the eye biologically operates and its specific limits.

Yes theres a limit to what the human eyes can see. When it comes to screen resolution, This limit is wholly dependant of your viewing distance. If any 720P screen (whatever its size) takes your entire field of vision, you will easily be able to tell the difference between 480P, 720P and 1080P +. Think about it, what is the need for a 720P HMD, why not stick to 480P? Because the difference is noticeable when the screen takes an important part of your field of vision. In a couple of years, we will see 1080P HMD, and they will look better.

I have a HMD. Standard resolution, but it doesnt matter to understand this principle. Those 720P HMD will not look better then my 1080P TV. They will look on par with my 720P projector looking at the 92 inches screens from 1.8 meters.