Reuters:

When iPhone users want to edit blemishes out of their selfies, identify stars and constellations or simply join the latest video game craze, they turn to Apple Inc’s App Store, where any software application they buy also includes a 30 percent cut for Apple.

That commission is a key issue in a closely watched antitrust case that will reach the U.S. Supreme Court on Monday. The nine justices will hear arguments in Apple’s bid to escape damages in a lawsuit accusing it of breaking federal antitrust laws by monopolizing the market for iPhone apps and causing consumers to pay more than they should.

Major implications here for Apple and the App Store.

From the Supreme Court document summarizing the case:

Electronic marketplaces such as Apple’s App Store present a new wrinkle on this doctrine, because the marketplace sponsor (e.g., Apple) interacts with and delivers goods “directly” to consumers, but as an agent on behalf of third party sellers.

And:

Whether consumers may sue for antitrust damages anyone who delivers goods to them, even where they seek damages based on prices set by third parties who would be the immediate victims of the alleged offense.

Gonna keep my eye on this one.