Nintendo 3DS

From: xnamagem
that the screen has 3 dimensions because there is a 3D effect.

How would you represent a second set of pixels don't increase the resolution, but add a second POV?

The best way I can think of is a p/i system where 800x240 games or media that don't use the sterescopy are refered to 800m and stereoscopic games and media that use the feature are 800s.

The resolution is 800x240. That's it. The 3D effect has nothing to do with resolution.
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The 3D effect has nothing to do with resolution.

This.

If we were talking about holograms or something, then I could see adding the extra dimension, but the 3DS isn't 3D in the same way the real world is, it just appears that way through optical illusion. If you wave your hand above the screen in the same space the image appears to be popping out into, you're not going to actually hit anything. It's the illusion of depth, not actual depth.

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If one were to say that, one would be wrong, because there is actual depth in the real world, which there is not in 3D movies and such.

And there is such thing as monocular depth perception. It's less accurate/more difficult to see actual distance (That is, you see that there is distance between two objects, just not how much/how far the distance between the objects is), but you don't need two eyes to see the real world in 3D.

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There is no doubt that the world is 3D. Nintendo never intended the games to be physical there, just visual. So, I will stick to the visual aspects of the world and how we see it.

"so theres no number for the 3d pixels? this confuses me."

3D pixels are called voxels.
I think the only way to measure voxels in a game would require measuring how far before the view culls, the resolution of the screen, and the angle of the FOV of the player, but it's not exact. You may even have to double the total(400x240 would be what we would consider the screen resolution if we are going to assume two POVs equal two sets of voxels).

One thing we can count a lot easier is polygons.

"flashed" makes it sound like the images are alternating.
The 3DS renders and displays each frame at once to both eyes. Technically, everything on a screen "flashes" frames to create the illusion to movement, but it's not neccesary to note unless comparing to a media that doesn't "flash".