Actually, now I can't find the "elsewhere" either and I wonder whether I misread. Having looked again, I agree with you: standard-according-to-Snellen vision means being able to resolve features corresponding to (e.g.) an "E" on a 5x5 pixel grid with pixels of size 1 arc-minute.
Matching that up with the resolution of a display device is still a bit subtle. For instance, suppose you're trying to display an "E" of that size on the display, but it's offset by half a pixel vertically. Result: you get a grey rectangle that's a bit darker along the left edge. :-)
(I think my conclusion from all this is: what Apple are claiming about the iPhone 4 display is about as close to the truth as it's reasonable to expect in marketing materials. That is: everything they've said is at least defensible, but they've put a very positive spin on everything. Seems fair enough to me. And as a pixel-freak who isn't currently a smartphone user, I'm awfully tempted by the new iPhone...)
Matching that up with the resolution of a display device is still a bit subtle. For instance, suppose you're trying to display an "E" of that size on the display, but it's offset by half a pixel vertically. Result: you get a grey rectangle that's a bit darker along the left edge. :-)
(I think my conclusion from all this is: what Apple are claiming about the iPhone 4 display is about as close to the truth as it's reasonable to expect in marketing materials. That is: everything they've said is at least defensible, but they've put a very positive spin on everything. Seems fair enough to me. And as a pixel-freak who isn't currently a smartphone user, I'm awfully tempted by the new iPhone...)