109ppi is good enough, but there is a significant difference. It's true that beyond a certain point it doesn't make a difference (1080p phones, I'm looking at y

109ppi is good enough, but there is a significant difference. It's true that beyond a certain point it doesn't make a difference (1080p phones, I'm looking at you!) but 109ppi is not that point, for most people. Retina web content and applications look decisively better.