Touch-screen digital cameras offer, there are good reasons for adding touch controls to point-and-shoot cameras. For one, there's the convenience of being able to simply tap an icon with your fingertip to make a fast setting change. Also, you get unique features like being able to select what you want to focus on just by tapping on the subject in the display.
In playback mode, manufacturers have made it easy to flip through images by dragging your finger across the screen or zoom in on an area with a tap. Nikon and Sony also give you the ability to write on a photo and save a copy, which can be both fun and practical.
There are some downsides, though. Touch screens add to the cost of a camera and the interfaces can be slow, especially compared with physical controls. Plus, using the screen for everything puts a real hurt on battery life.
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