The Galaxy S4 Camera is an obvious evolution of the Galaxy Camera launched last year with the addition of LTE connectivity and a 1.9MP front facing camera. Both features were sorely missed and the addition of cellular capabilities should send this camera into the hands of many photographers.
The smartphone specs are very similar to the S4 Mini and, while the sensor is the same as the one found in the original Galaxy Camera, the 10x zoom is more useful and manageable. The zoom's maximum aperture range is rather slow, but with available ISO 3200 or for pictures shot in broad daylight, image quality should be better than any currently available smartphone camera.
The Galaxy S4 Camera will be available Summer 2013 for a yet to be determined price.