CNET has confirmed that the Samsung Galaxy S4 will be the definitive model at the unveiling on the launch date of 14 March 2013 at the Samsung Unpacked event in New York.
The current thinking regarding the Samsung Galaxy S4 tech specs is as follows :
Processor : Octa-core Exynos 5 / Quad-core Exynos / Snapdragon 600 1.9Ghz
Display : 4.99" 1920x1080 Full HD Super AMOLED (alternatively, SoLux or SLCD)
OS : Android 4.2.2 Jelly Bean
Memory : 2GB RAM
Internal storage : 16GB, 32GB or 64GB
Camera : 13 megapixel rear with 1080p video recording, 2 megapixel front
Dimensions : 140.1 x 71.8 x 7.7mm
Weight : 138g
The biggest uncertainties remain in the two "biggest" items, namely the choice of processor and the display. To date it is yet to be confirmed whether the processor would be based on the awesome new ARM big.LITTLE architecture which would mean the 8-core Exynos 5 chipset, or a more "normal" quad-core Exynos but clocked at a slightly higher rate, or as some have said, unlikely though it may be, that Samsung would abandon their own Exynos series and go with Snapdragon instead.
As for the display, most are in agreement that it would be 4.99" or you could round it off to 5" if you like, on the other hand the concern is whether Samsung is finally, finally ready with their mass production of their Full HD Super AMOLED display tech or they have to fall back on something else such as Super LCD or some such equivalent. All will be revealed on 14 March 2013, including the official release date, product availability and so on, hence we shall wait and see.
See also :
1. Samsung Galaxy S4 tech specs