They will at some point, the future is in here, and they need to adapt to it.
And yes, those who do not have access to computers are the poorest ones from the 3rd countries who do not even have acces to "US dollars" since they are using inflated currencies who are not even worth $0,01.
...compared to say u.s. dollar bills which you can hold in your hand or stuff in your mattress.
this is why bitcoins will not go mainstream because majority of human beings on this planet do not have access to a computer.