You guys seem to be forgetting, this camera allows you to ZOOM IN up to 4x, and still take a picture as crisp as a regular un-zoomed picture. Can you do that with the S4, iPhone5, or even Nokia Lumia 920? No, you can't, and that's what differentiates this camera phone from all the others.
And for all those criticizing how it being $100 more expensive than S4 and iPhone 5 is a bad idea, consider this: how much do you have to spend for a real digital camera? Yes, more than $100. Now another concept, with the Lumia 1020, you don't have to bring anymore cameras anymore. Literally.