Pretty as a picture

The camera in the new iPhone 5s has a newly designed sensor that starts to push back against "more pixels are better" mind set. Right now there are a ton of articles comparing the 5s' camera to what is thought by many to be the "high end" of phone cameras the Nokia Lumia 1020. The Nokia has some pretty impressive stats that include a 1/15inch sensor, 41 megapixels, a Carl Zeiss 6 element lens. Basically the Nokia Lumia 1020 is a moderately decent point and shoot camera with a phone attached to it. However, while these stats may sound impressive, the proof is in the performance. Sadly for the Nokia, in many of the reviews that I've read, the iPhone 5s preformed either as good or better than the Nokia.
This better performance is partly due to the fact that Apple purposely kept the pixel count low while increasing the the size of the sensor. This creates larger photo-sites and, as a result, it has greater light gathering capability, especially in low light situations.
Don't just take my word for it. Look at the results here and here.