20% lighter than the 4S
Retina display, 326 PPI
"The new screen on iPhone 5 is a 4 inch display."
1136 x 640 screen resolution
16:9 aspect ratio...
"Why did we make it this size?"
"It's because of your hand. It should fit there. That's how we designed the iPhone 5."
esto hace la diferencia IMHO...