anything people "do" in bitcoin, they could already do using fiat instead of bitcoin. both clickjett and logicoins make flight and lodging more expensive than the same service from the same company in fiat - the bitcoin factor being 50% novelty, 50% crowd marketing?
but lets say that you are not american.. or canadian..
lets say that you're a tourist with a euro bank account , many standard services in america/canada do not accept a euro debit card (yea it happens) even restaurants and other places in canada dont like euro debit cards. and as for the tourist, he has to either withdraw cash from his euro account and convert it to dollars, risking pickpocketing when carrying around hundreds of dollars on his persons.. or get a dollar based credit card.
all of which have expensive conversion charges and also application forms and waiting days to receive the card.
. also imagine you want to move to canada, imagine the hassle of having to change bank accounts, inform customs of carrying over $10k on you, and then once you become a resident of canada. you then have to go through months of making business plans and meeting bank managers purely to get a business account.. and then once you have a business account you then have to apply for a payment gateway service to accept card payments. along with the risks of fraudsters, and monthly charges just to use a card processing machine
all of which you dont need to do when you use bitcoin.
people forget how much bureaucracy is involved with setting up fiat accounts or moving funds. with bitcoin all you need is a smartphone and a QR code, set up takes minutes, not months