There are regulatory hurdles, technical challenges, and consumer acceptance, to name a few.

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Google has also done a masterful job (thus far) of working through regulatory issues and wooing consumers and policy makers by most measures, regulatory and consumer acceptance will be the real limiters to adoption.

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Netflix : As mentioned in our previous response, management believes that in a largely fixed-cost streaming world with ease of cancellation and subsequent rejoin, net additions provides the most meaningful insight into our business performance and consumer acceptance of our service.

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The churn metric is a less relevant and reliable measure of business performance, and does not accurately reflect consumer acceptance of our service.

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The three handsets on Verizon's LTE lineup now offer dedicated back covers to lead the charge (pun intended) to general consumer acceptance, and dozens of other companies are working to integrate inductive charging surfaces into everyday items like furniture, desktops, or the middle of your car.

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The key to mass consumer acceptance is to add social and "gamification" elements, according to Dave Wang, chief executive of Striiv.

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