Silly is an understatement. It's downright stupid. I can't believe there are people who actually want a taller but not wider phone. Why? What possible reason could there be for wanting it that way? Any reasoning that I've heard people come up with is just trying to come up with some rational reason to justify this. Is there anybody out there who ever thought to themselves "gee, I wish they would make a taller iPhone, that would be great"?
I'm a huge fan of Apple, but this has really thrown me for a loop. I'm still holding out a small glimmer of hope that it's not true but that glimmer is getting smaller by the day.
I can answer your question. The main purpose is to match the same ratio you see in many movies. Since iTunes is now supporting a lot of movies, they wanna be able to show the whole screen without black bars on top/bottom or panning/cutting out portions on the left and right side.
But they are too little too late. They shouldn't have missed with the height only. The original resolution was 960x640. The standard for film and all
digital cameras and hdtv is 1920x1080. 960x2 happens to fit into 1920
PERFECTLY. 640x2=1280, so maybe they can double the width and add
ability for subtitles and movie controls without touching the 1080p area.
(you can get 200 pixels tall for movie controls like pause, play, etc or subtitles, etc).
If they can squeeze 1920x1280 into 7 inches (perfect doubling of 3.5 inch
screen of i4s) using current retina display, then you basically have
the iPad Mini. That would be the perfect size. 7 inches is a little big
for only the screen for an iPhone, so they would have to go a little higher in
dpi than current retina for i4s (perhaps towards 400+ dpi) and squeeze it into 5.3 or 5.5 inches, then that would be perfect for iPhone.
An iPhone at wallet size (size of your wallet is about 5-6 inches) is perfect.
I think LG or some company in Korea or Japan already introduced this in
5 inches (@1920x1080p). THAT would fit perfectly in iPhone. You would
be able to see full HD movies and full HD digital camera pics, tv shows, and all current hdtv gaming and film WITHOUT LOSING pixels or rescaling.
In fact, that is the holy grail size. 5-6 inches at 1080p (or 1280p in iphone's case). Guess which phone falls into that size? Yep. Galaxy Note. That is why it is a fast seller. The only thing holding that phone back is that it is using slow Java, and that stupid Pentile Matrix LCD. If you see Pentile Matrix, run away. I think Galaxy Note 2 will be the one to watch. If they stick with Pentile Matrix, skip it. If they can hit 1080p in 5.5 inches. That will be the hot seller.
As for the comment about the thumb not being able to scale across the width of the screen using one hand... that is simply not true. When I hold my wallet, naturally, the fingers on the bottom locates the middle point for balance. When I pick up my iPhone, naturally, I will hold the thumb and bottom fingers near the middle. Rarely will people pick up an iPhone and force it into the pocket of your hand like a baseball in a mitt. Try it yourself. You naturally will locate the center and squeeze near the middle. If your bottom fingers are near the bottom middle, your thumb can easy traverse the width of a 5.5 inch diagonal
screen. (4.3 no problem either, thought that would be great, size of a PSP). Even with a 3.5 screen (like i4S), you will NOT put it totally inside the pocket of your hand. Because it is extremely difficult to touch the right part of the screen with your thumb (you would need to bend it so far it would be uncomfortable). You will naturally balance your phone in the middle and let it hang lower on your other fingers, allowing your thumb to easily touch the right side of the screen in extended mode (not bending). This is basic comfort testing and design. I am hoping Apple didn't simply measure the length of the thumb and not actually test people using it, then force everyone to stare at a tiny 3.5 screen and get stuck at that size forever!