10 of 12Image
The gold iPhone 5s seems to have been quite a hit, so I'd expect Apple to offer the same finish as part of the iPad 5 line.
M7 motion coprocessor
While I don't think that anyone is going to be stratting an iPad to themselves and using it as a pedometer, the M7 motion coprocessor used in the iPhone 5s is supposed to improve the accuracy of the motion sensors, and so could be important for gaming. With this in mind I expect the new iPad to have this chip on the mainboard.
Retina display on the iPad mini
Rumor has it that the iPad mini's screen will be bumped up to a retina display, but this could put quite a pressure on the device's battery. Apple would need to make power savings in order to keep battery life at the current 10-hour mark.