"Upgrade to iOS 16.4 for Exciting New Features and Enhancements"
iOS 16.4 brings new features including a reworked Home architecture for efficiency, reliability, and speed, 21 new emojis, and the ability for web apps added to your home screen to send push notifications using the HTML5 standard Web Push API. Users will need to update all their Apple devices, especially Home Hubs, for the new Home architecture to work smoothly.