Cadillac superserves drivers in a hurry with its optional Easy Key system, enabling passive vehicle and trunk entry and keyless ignition via a personalized keyless fob.

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Normally, standard gasoline vehicles are retrofitted in specialized shops, which involve installing the gas cylinder in the trunk and the CNG injection system and electronics.

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The most notable omission is infrastructure construction of a gas gathering system to tie into, with luck, an existing nearby major trunk line.

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Concocting an "in-car gaming system" that utilizes a GPS receiver, handheld computer, headphones, and a laptop in the trunk of the whip, the Backseat Playground would eventually turn real world "sights, attractions, and locations" into in-game characters and events for the lucky passenger(s).

ENGADGET: Backseat Playground to integrate GPS into in-car gaming