A new survey commissioned by CNBC is as good a reason as any of why Apple's stock price has been on such a tear in recent years. More than half of all US homes own an Apple product, according to CNBC's All-America Economic survey -- and 1 in 10 homes that don't own any Apple products plan to purchase one in the next year.It's a fantastic business model the more of our products you own, the more...

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