In part six, I argued that there could be stark benefits and massive business disruption even at low penetration rates of driverless technology.

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Repeaters can solve the penetration problem and we know that technology moves swiftly down the price curve.

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Never mind that, as fellow Forbes contributor Adam Thierer has written, almost no consumer technology has ever reached 100% penetration.

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Even skeptics of Moy's plan, like Marcus Ranum, chief technology officer at Tenable Security, agree that more comprehensive penetration tests may be the only way to show companies how badly they need to revamp their security.

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Better to put cheap software-defined radios in the hands of penetration testers who can demonstrate the insecurity of those communications than to reserve the technology only for better-funded attackers who would exploit the same wireless communications in secret.

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In fact, I strongly believe any nascent technology that cannot exist without subsidies beyond an introductory period will not gain market penetration, and is not worth supporting.

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The penetration of CDMA in Mobile Phones Sold represents the percentage of worldwide mobile phones sold with CDMA-enabled technology.

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Today, economics, the U.S. shale gas reserves, advanced technology, and fuel economy and emissions standards are driving natural gas towards historic levels of market penetration.

FORBES: Guest Column: The Shift To Natural Gas Vehicles Is Happening