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Death to px, long live ch! – Terence Eden’s Blog

Pixels are a lie. Even if you think you're drawing something with "pixel perfect" accuracy, your monitor is lying to you. There is no grid of platonically perfect squares. In CSS, pixels are a double lie: Note that 1px doesn't necessarily equal one physical device pixel. On HD displays, it may span multiple physical pixels. Similarly, 1cm in CSS often doesn't correspond to one hundredth of SI…