Even before the iPhone 5S is out, analysts are talking about the next iPhone 6 for 2014 and this is what they have to say.
Last year's iPhone 5 was an evolution over the previous iPhones and this might be the case with the upcoming iPhone 5S as well. The new 5S is reported to come with multiple color options (taking cues from Nokia it seems), an upgraded quad-core Apple A7 SoC, a higher resolution 13 MP camera as well as a fingerprint scanner (if the technology is ready and working on time). However, these features don't really excite because the basic package will still remain the same, i.e. the design and the display size and even the screen resolution will most probably remain untouched.