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A comment on IBM scientists say radical new ‘in-memory’ architecture will speed up computers. Parent comment

Re:IBM scientists say radical new ‘in-memory’ architecture w... by giobox on Friday October 27, 2017 @04:01PM (#15571736)
The PPI required for the "Retina" effect is largely dependent on viewing distance, which is why Apple vary the PPI according to the device, they aren't a blanket ~200 PPI as you suggest.

The Apple Watch and most iPhones (including the original Retina display on the iPhone 4) are around 300-400 PPI, with the X being 458. Only Apple's "Retina" laptop/iMac displays have been around 220, which normally looks great given the increase in the viewing distance.

Wikipedia has a pretty nice breakdown of the PPI of all Retina displays Apple has shipped:

https://en.wikipedia.org/wiki/Retina_Display

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Re:IBM scientists say radical new ‘in-memory’ architecture w... by theyregreat on Friday October 27, 2017 @08:53PM (#15573414)
Higher dpi maybe required for those kids these days whom hold their phones a few centimeters / inches from their eyes. I call it sera rubens myopia, Latin for glowing myopia.
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