Apple have got to seriously up their game this time as they have fallen behind.
I hear rumours of a dock connector change but surely that would be madness as all the cars, home stereos, alarm clocks etc etc will be made redundant. Even if they make an adaptor it would look silly on a lot of stuff.
It will have to be legacy width, height yes could change to make the screen bigger.
Victim of their own success with everything being made for it? As now they can't make major modifactions to the legacy size.
Have they really fallen behind though? Ok, other devices have such large screens they are practically tablets. In terms of performance, as long as the device does everything thats thrown at it, why do they need to say they have 2x quad core gpus, 10x dual core cpus etc etc. All this performance ultimately has a hit on battery life. Ask anyone thats got an Android phone with a massive spec and screen, and they get far less life out their phone when they use it properly. Most end up fitting massive expanded batteries.
The smaller dock port allows for more internal space for the device.
The only thing the iPhone needs more of, is battery life. Thats it. I like my discreet 3.5" screen really. With the res, i have no issues using it. Its still nice and small for my pocket too. If they increase the screen size i wont complain, but everyone seems hung up on this aspect and demands a "complete redesign". Do we really need it?
iOS6 and O/S features in general are far more appealing to me than a hardware refresh.