There are thousands of articles that forecast the iPhone5s and iPhone 6. There are predictions from a 64bit chip to a 13MP pixel for the rear camera. The iPhone 5s (if that is the name) will
- Screen size will remain as the iPhone5
- Start from 32 GB
- Have the dual core A7 Chip
- Have NFC
- Have rear camera will remain as 8MP
- Have the same form factor
If the iPhone 5s / iPhone 6 has a 5″ screen with the same form factor it will be off track from design point of view. With all mobile devices have great designs, Apple has not returned from their 2 year old design.
The reason the dual core A6 / A7 is a match for the quad processor on the S3 / S4 is because the iOS is particularly created, designed for the hardware, unlike the Android for different mobile devices.