It seems as if nothing can be known about Apple’s products just before they are released.
I’ve come to trust the rumours, but take them with a pinch of salt — some of the things that people believe about the next Apple product is just too much, but some of it is actually smack-bang right what turns up. I remember a time when some theorised that Apple might do away with the Home button on the iPad after looking at their promotional posters for WWDC.
Turned out that the Apple posters were simply the iPad used in landscape mode.
Still, I do believe that the new iPhone — likely the iPhone 5, unless Apple pulls another S and makes it the iPhone 4SS — is actually likely to keep the original screen, and I trust that Apple might change their dock connectors.
However, I don’t really believe the rumours that Apple might change their screens to 4 inches diagonally — this sounds a lot like the previous rumours of Apple changing the size of their iPhone. I like the iconic design of the iPhone and think that the screen is definitely a part of it. It hasn’t changed through the iPhone 1, iPhone 2, iPhone 3G, iPhone 3GS, iPhone 4, iPhone 4S — why change it on the seventh new release?