Those are the same tools used by fitness-oriented digital pedometers to track the number of steps a user has taken, their speed, the distance they've climbed and other location-based data.

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The social-oriented interface looks seriously tricked out with faces (hopefully of people the user knows) moving in and out in three dimensions -- usability is an open question, but at least it's pretty to stare at, which is really what a good phone's all about anyway, right?

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Run on an eight-inch screen with a similar screen faceplate behind the steering wheel, the Cadillac User Experience allows touch-based feedback (see the demo in the video above), vibration-oriented lane departure warning and (finally) a recognition program that responds to normal spoken requests for directions or music.

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For a plain-English explanation of how GRATs and other estate planning opportunities work, see Estate Planning Smarts: A Practical, User-Friendly Action-Oriented Guide, the bestselling book by Deborah L. Jacobs .

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Deborah L. Jacobs, a lawyer and journalist, is the author of Estate Planning Smarts: A Practical, User-Friendly, Action-Oriented Guide.

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Deborah L. Jacobs, a lawyer and journalist, is the author of Estate Planning Smarts: A Practical, User-Friendly, Action-Oriented Guide (DJWorking Unlimited, 2009).

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Jacobs is a lawyer, an award winning journalist, and the author of Estate Planning Smarts: A Practical, User-Friendly, Action-Oriented Guide (DJWorking Unlimited, 2009).

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Deborah L. Jacobs, a lawyer and award-winning journalist, is the author of the bestselling book, Estate Planning Smarts: A Practical, User-Friendly, Action-Oriented Guide, 2nd Edition (DJWorking Unlimited, 2011).

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