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> On retina smartphones, making the pixels denser wouldn't make the image look any sharper from a typical viewing distance.

If that were true, there would be no reason for Apple to switch from 326ppi to whatever they use now for new phones. The real point where this stops making a difference is likely somewhere much higher, just like with framerates. That doesn't mesh well with their luxury electronics marketing narrative, though.

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Yeah, and digital camera manufacturers aren't adding megapixels for nothing and processor makers don't chase higher clock speeds for nothing, right? Because why would they keep adding pixels and increasing the clock frequency just to make the tech numbers look more impressive in order to sell more electronics? Yes, sounds pretty ridiculous.

Now of course, maybe the new retina screens appear slightly sharper if you have exceptionally good eyesight, but I have long ago stopped seeing any improvement in sharpness of smart phone displays. The screens do look better in terms of better colours, contrast etc, but at a typical distance with an individual with normal eyesight, adding more pixels does pretty much nothing at this point.

Ya, why would Tesla make a car that can go 0-60 in 2 seconds if that wasn't a noticeable improvement in usefulness?

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