Unless you’ve been meditating on a mountain top in Tibet, you’ve heard about Siri, the voice-activated personal assistant included with the Apple iPhone 4S. Ask Siri to find a restaurant, make a call, or when your next appointment is, and she’ll respond appropriately. Recently, I’ve also had the opportunity to try out Kinect, the motion-sensing input device included with Microsoft’s Xbox console. Both Siri and Kinect offer user interfaces that are charming, intelligent and easy to use.

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