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’s annual developer conference on Monday lacked the splashy announcement that fans are used to seeing at WWDC. There was nothing like the Vision Pro reveal from 2023 or the Apple Intelligence announcement last year.

But there was an important software update that, later this year, will change the way all of Apple’s major devices, from iPhones and Mac laptops to Vision Pro virtual reality headsets, will look. It’s a new design language that runs across all of Apple’s operating systems. The company is calling it Liquid Glass.

For Apple, it’s the first significant redesign of its iPhone operating system since 2013, when the company announced iOS7. Apple says the lock screen will look like it’s made out of glass. Buttons will turn into little glass pills, fluidly sliding over glass rails. And there are new animations, including when answering a phone call.

The unveiling underwhelmed Wall Street, which sent the stock down 1.2% on the day. Investors are pressuring Apple to make big changes to its artificial intelligence strategy, pushing it to match the frontier models capabilities of rivals such as Google