Faster processor, improved 3D graphics

Hey, it's an obvious one, but we gotta say it.

Apple has consistently improved the iPhone's graphics capabilities with each new iteration of it, and not surprisingly, we've come to expect a performance boost (and would be disappointed if we didn't get one). Apple says the dual-core A6 chip has a 2x performance boost over the A5 chip found in the iPhone 4S. It's also smaller and allegedly more energy efficient.

Chances of implementation: 90 percent