[simonh]

That's true on conventional panels, but the whole point of retina is that the pixels individually are smaller than the human eye can resolve. I'd be interested to see in practice. I suppose it depends how far your eye needs to be from the screen for it you count as retina in that way.

[nitrogen]

The inability to discern an individual pixel with the same color as its neighbors doesn't mean that the same pixel with a vastly different collor won't be seen. A single bright green pixel in a white window will still be visible, even if the edges of the pixel itself can't be seen otherwise.