In addition to the basic hardware bumps you already mentioned, I want to believe that Apple will focus on adding more cloud services to the iCloud experience, things like:
- Larger back up space, when you buy an apple product you get the same size server size for your iCloud account
- Expand on Apps that leverage the 64bit processors: more powerful productivity Apps and Games
- Smart Home products that can be easily monitored and controlled via iOS: video surveillance, alarm sensors, control appliances, etc
Hardware wants, not necessarily predictions:
-Stereo speakers.
-A dedicated AirPlay module that can communicate with any other old iOS device and enable those other iOS devices to run as AirPlay players. Additionally be able to control their cameras and receive their input. So we can reuse old iOS devices for playback/or access their cameras remotely.
And I think they will releasing a new iOS 8.