Note I said camera/photo system. With the 5S not only is the camera improved, but so are all the supporting elements, which yields, IMO, a greatly improved experience.
(I've posted this a couple of times in other threads):
The aperture is larger, the optics are better. The underlying hardware supporting the camera (eg. CPU, etc) is greatly improved. Those 8 megapixels? On the 5S, those 8 megapixels are 15% larger than the same 8 megapixels on the 5 which, among other things, helps yield 33% better low-light improvement over the 5 .. and the 5 already had significantly better low-light performance than the 4S.
Upgrades the 5S camera has over the camera in the 5 that I can think of off the top of my head (let alone the 4S -- the camera has improved every year):
The improvements to the camera system on the 5S are significant.
- Larger aperture for the lens (this lets more light in: this is A Good Thing)
- 15% larger sensor/pixel size (this gives higher quality color, less noise in the photo, overall a measurably better quality photo -- outdoors and in)
- 33% better low light performance
- The dual LED system that measures the 'temperature' of the ambient light creates a flash 'color' that matches the ambient light creates greatly improved, more natural looking flash photos.
- Because of the better hardware on the 5S, you can run the camera in 'burst mode' which will shoot 10 full sized photos per second as long as you hold the button down.
- You can film HD video at 120 fps (4x normal) if you'd like, to get slow mo effects.
- When you take a photo, the camera system actually takes several photos back-to-back in rapid succession, analyzes each one, and uses the 'best' one. This all happens so fast as to appear to be instant.
- When you take a photo in a low-light situation, the camera system actually takes several photos back-to-back in rapid succession, analyzes each one, and will composite the 'finished' photo based on the best parts of each. This helps mitigate 'blurring' of subjects that is so common in low light photos. This all happens so fast as to be appear to be instant.
I'm well aware of the hardware changes. What you wrote is basically taken from Apples own marketing department.
The most interesting points are the first three ones for any photographer. Interesting numbers, but it still remains to be seen how much more impressive it is once we see its real life performance.