That being said, the best screen upgrade I can ask for on the current model would be a frameless edge-to-edge screen. The glass surface is about 5.7cm wide, while the illuminated portion of the screen is only 4.9cm. If they could deliver a screen that fills the entire width and kept the same aspect ratio, it would be a 16% increase but, more importantly, be the sexiest front-side of a mobile device ever seen.
Odd, that there is so little talk about how to have more screen and less volume, area or bulkiness.
You need to have small bezel to avoid accidental pressings, when holding the device. I have suggested in the past that to get a grip from the side of the screen, the outer ring (1cm?) of screen could also be non-touchscreen. GUI designers should just avoid putting buttons to the end of the screen.
But there's a lot of optimization that could be done to iphone's face.
Why speaker and home button can't be at the edge of the screen and also at the edge of the phone?
Making the aspect ratio to 1.78 (16:9) from 1.5 might help some, but the big change should be done in iPad. Maybe both having 1.5 would be a good compromise.
But they surely have to be closer to each other than 1.78 & 1.33 if same apps are used on both. 1.67 & 1.5 might also work.
I find it hard to type with iPhone in vertical mode, so if they would go with 1.78, maybe there should be new 3-row keyboard (letters in center and the rest on the sides).
HMMM, since these keyboards are software, I'm starting to miss customizing them... Can you do this without jailbreak?
It's very annoying when you are replying to someone's message in landscape mode and you see only tiny fraction of the message. 3-row keyboard would help.
I find it hard to believe that most people would find bigger screen annoying if it doesn't grow the overall volume much. Also, it can't be that big deal, if width grows a mm or two. Outer dimensions of iPhone are now about 2:1. There's no reason why there couldn't be similar screen in it.
I guess the original decision to go with 3.5" was just economical. Bigger touch screen 6 years ago could have easily cost more than the whole phone.
Life changes and evolves and so does tech. Shouting out that 3.5" will stay forever sounds to me the same like "640kB should be enough for all".
And if someone is worried about bulkiness, Apple could lighten the iPhone a lot by replacing the glass by plastic. Maybe they have an idea that phone feels more valuable when it feels heavy, but I'd like to test the lighter one...