When each eye sees very similar, but different versions of an image, the brain thinks it is seeing depth, or three dimensions.

VOA: special.2010.01.26

The NX300 also includes i-Depth, an easy and simple way to adjust the depth of an image using the NX Series' unique i-Function system which enables users to modify camera parameters using the lens itself, adjusting the image without ever having to move off target.

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By passing through this screen, visitors leave behind the grid of the city streets and enter an experience where spaces flow freely into one another, gently canted forms lend a sense of dynamism to the walls and ceiling, and surfaces de-materialize into the weightless, illusory depth of the moving image.

ENGADGET: Museum of The Moving Image plans multi-million dollar updates with HD, 3D

The much larger sensor and superior processing gives you massively better image quality, they're much faster (with little or no lag) so better for action, there's a lot more creative control over things like depth of field, the option to change lenses, add flashguns etc add to creative possibilities and also increase image quality.

BBC: Tips for picking the right camera