Unfortunately, this rationale only works out for American and European gamers. South American gamers are getting a little bit screwed out of the whole deal.
Back in September, it was revealed that the PS4 was going to cost 6,500 Pesos (roughly $1100 USD) in Argentina. Now, Sony's announced the cost of the PS4 in Brazil and it's somehow an even bigger figure. Brazilians will have to pay 3,999 Brazilian Real, which is the equivalent of $1850 USD.
The increased costs are due to import fees, taxes, and the simple fact that there's a smaller consumer base in South America.
In any case, it might be cheaper for Brazilian gamers to fly to the United States, buy a PS4, and then fly back.