In effect, what Bell and others are creating is TiVo for real life. Whatever flows through your perceptual systems can be rewound and queued up for viewing at a later date. Arguing with the barista over whether you specified soy milk in your latte? Trying to determine who actually came up with that brilliant money-saving idea in the staff meeting six months ago? No problem -- just go to the tape!

And we can then yell at people with Alzheimers for not backing up.

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