Philadelphia (CNN) -- Darryl Williams and Benjamin Kline were shivering before the speech even started, their black umbrella no match for the steady rain and brisk Philadelphia wind.

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Sensors and microchips could be applied to your bag or jacket pocket and remind you to take your umbrella with you if the forecast is for rain or not to forget your house keys if you are leaving the house.

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Mocking those who insist on going into the rain without an umbrella or who claim that night is day, cold is hot, snow makes for a good time at the beach, money printing generates wealth, and nations can tax and spend their way to prosperity may not solve any problems.

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