I agree with you @techwizardry.
I am going to put you on the spot...I think that will happen...or at least we will get to the point where fiat is just a minor part of the currency used....
Do you have any guesses on time frame?
I saw one that estimated it was only a couple years away.....I am not sure I can see it moving that fast.
Another point that validates your claim....I believe in 10 years, we will have most of the $100 Trillion world wide economy on the blockchain and fiat isnt spoken on the blockchain.