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Could this comment be more Hacker News? There are not 7 billion people that this will impact. How many of those have no access to a computer of any sort, including a mobile phone? How many are under the age of ten? That cuts out a huge chunk from that figure. Then subtract all those too old to care about Bitcoin or internet anything. Then remove from that those that have little faith in anything they can't touch and…
>How many of those have no access to a computer of any sort, including a mobile phone? Irrelevant to your point, but less than you might think. Currency transfer using texting is popular and highly functional in several poor African countries. I agree with your assessment that these people won't be affected by Bitcoin, but using mobile phones to send money is actually VERY common in some poor countries.
There are people that will never have the chance to own a mobile phone. They have other priorities, like fresh water, AIDS or malaria medication, or a reliable source of food.