I agree completely and this has been the main drag I have with bitcoin, people struggle with whole numbers let alone decimals! This will frustrate people to the point of no return. A universal currency system has to be built with the lowest common denominator in mind.
Couldn't agree more!
We say "calories" when we mean kCals– if Bitcoin does become completely mainstream, I see no reason why casual users wouldn't just say "bitcoins" instead of "milliBits".
I do hope you are right and that the extreme fractional math won't be an issue, but have my concerns still, because the valuation is so critical to the meaning of the names. It won't be like a dime that always means the same thing, because the average value of a dollar doesn't impact thinking through daily purchases.