Time to use your brain guys, you can just use millibitcoins or microbitcoins. The bitcoin-qt client already let you choose that.
That would like be 74.52 microbitcoin
Now let us assume that you just gave that information to John or Jane Doe who understand dollars.
They still don't know how much MONEY they are going to spend.
My $.02.
now lets assume that there are people in the world that never travel abroad,, so they have no clue how to convert euro's to dollars...
now lets assume that there are regular travellers that can convert euros in their head in milliseconds.
are you saying euro's are a failure because some people cant convert.
now then when bitcoins develop, most items would be priced in fiat and at the cashiers desk. those people that can convert bitcoin(because they use bitcoin regular) would ask to pay via bitcoin. those that fear new experiences would stick to fiat.
there will not be a time when only bitcoins exist, so suggesting those that are inexperienced would suffer is wrong.
my $0.02.