A workspace can be multiple apps running in split screen. If you want to open two apps side-by-side, you can now just drag and drop an app icon from the dock to the main screen. Apple also implemented a new spring-loaded, drag-and-drop system. Now, you can drag documents and photos across multiple apps. You can also manage your files in the new Files app. On the iPhone, most of the changes are under the hood. Many developers have been playing around with ARKit, Apple's new augmented reality framework. It makes it much easier to create AR-enabled apps, with iOS doing the heavy lifting. The most visible change is the new Control Center with customizable shortcuts (at least some of them). And, of course, by keeping your iPhone up-to-date, you get the latest security updates, performance improvements and new emojis.