Apple’s loss in a high-stakes Supreme Court case on Monday unsettled Silicon Valley, threatening a wave of new consumer lawsuits and other legal salvos that could challenge the size and power of the tech industry.

For Apple, the 5-4 decision means that iPhone owners can proceed with a class-action case targeting the company’s App Store. The suit accuses Apple of engaging in monopolistic practices by forcing Apple device owners to buy developers’ games and other software only through the App Store, while Apple takes a cut of some of the sales made there.

Read more at the Washington Post.