Wow. You, uh, don't think much about Accessibility, do you?
I'm 39 years old, very slightly near sighted (which is a good thing for this application), and start to lose focus on the phone display when I hold it about 7" from my eyes. At that range, I can just barely perceive single-pixel transitions if the contrast is very high.
My eyesight is quite typical. Many (perhaps most, even) will have more difficulty seeing those pixels than I will. And they are your target market.
The extra resolution doesn't hurt anything, obviously. And matching existing content (e.g. 480x320 apps or 720p video streams) makes the higher pitch attractive for technical reasons.
But don't dare to assume that your per-pixel content is visible on an iPhone 4. For huge numbers of people, it isn't.
I'm 39 years old, very slightly near sighted (which is a good thing for this application), and start to lose focus on the phone display when I hold it about 7" from my eyes. At that range, I can just barely perceive single-pixel transitions if the contrast is very high.
My eyesight is quite typical. Many (perhaps most, even) will have more difficulty seeing those pixels than I will. And they are your target market.
The extra resolution doesn't hurt anything, obviously. And matching existing content (e.g. 480x320 apps or 720p video streams) makes the higher pitch attractive for technical reasons.
But don't dare to assume that your per-pixel content is visible on an iPhone 4. For huge numbers of people, it isn't.