Apple is set to enhance Siri with advanced AI features in the upcoming iOS 27, but only select devices will benefit from the new on-device Apple Intelligence model. During the WWDC 2026 keynote, Craig Federighi, Apple's Senior Vice President of Software Engineering, announced that the iPhone 17 Pro, iPhone 17 Pro Max, iPhone Air, and select iPad and Mac models will be the only devices to access these features. Notable enhancements include expressive voices, which allow users to customize Siri's speech, and advanced dictation, which improves the accuracy of transcribing spoken words into text. While these updates promise to enhance user experience, older devices like the iPhone 16 Pro will miss out on these capabilities, even though they will still support iOS 27. Apple has not fully detailed the exclusive features but aims to highlight the positive changes available to all users. This strategy suggests a cautious approach to managing user expectations as the company rolls out its latest innovations.