This article is hype. There's nothing overly special about selling an unlocked handset anywhere on planet earth.
That article is all hype because the people this is news to, and the target market for a $500 cellphone don't have that big an intersection. I think everyone with a cellphone by now has been exposed to a carrier's store and seen prices for an off-contract phone. Hell, I'm guessing a lot of people have broken phones and been forced to pay off-contract prices - forcing the savvy to at least price out similar phones via alternate channels cough ebay. Pre-iPhone, they'd have a bigger point, but I'd think by now, the consumer smart-phone market (vs big-business' blackberries) is aware of certain things.
Am I being too hopeful?