And therein lies the thinking behind this decision. Amazon and Sony aren't free to just up the price to compensate for any Apple charges. But, you'd have to think that the publishers won't respond well to this decision themselves. Apple doesn't want to deal with them because it wants more of their money than they're willing to give, and now it's found a way to cut Amazon, B&N, and Sony off at the knees to get precisely what it wants? Apple is potentially pissing off a lot of major players in the ebook market with this announcement.Amazon can't just up the in-app price for a very, very large amount of books because of a little piece of rubbish called Agency Pricing.
And I hope Visa and Mastercard are paying attention. Apple is positioning itself to dethrone them both. Of all the likely future events that this points to, I'd say the most likely is this: NFC and electronic payments are coming to the iPhone 5 in a big way.