Aspect ratios are very important for UI design.

tester756 4 hours ago | parent | next [-]

But why paper's ratio is important?

	▲	abdullahkhalids 4 hours ago \| parent \| next [-]
		He is explaining that if you design an app that displays as desired on the outer display (in portrait mode). Then if you display that app to the inner display (also in portrait mode), it will show up exactly the same, just with everything twice as large. This obviously makes life easier for both users and developers.
	▲	benbayard 4 hours ago \| parent \| prev \| next [-]
		It's mathematically the only aspect ratio where this holds and thus you can resize in half and nothing has to move around.
	▲	Fuzzwah 4 hours ago \| parent \| prev [-]
		One reason is making it easy to scale things up or down for printing on standard sizes of paper.

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fwip 5 hours ago | parent | prev [-]

Moreover, app developers for iOS have to support fewer aspect ratios than developers of Android apps. In theory, this allows for more attention to be given to the UI design for each aspect ratio - rather than having to use a spring-style stretch layout.

If I were to guess, this does look like a new ratio to support, but at least it's just 1 instead of 2.