It's no longer a case of saying "One, Two, Three, Smile" then taking the photo. Instead you can press the "Smile Shutter", and your camera will automatically take the photo when your subjects smile!

As with all new technologies, I'm not sure it's ready for prime time yet. The USA Today review noted that while it worked most of the time, it missed a few opportunities, and was only able to recognise a smile in only one face in a group shot.
Still, expect this invention to appear in lots more cameras next year.
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