At its WWDC 2019 keynote, Apple announced a new extended desktop feature called Sidecar for the announcing iPadOS.
Naturally, you'll be able to use all WWDC 2019 keynote on Monday. Sidecar will also offer a sidebar on your iPad for commonly used controls, be it modifier keys for shortcuts, or buttons to hide the menu bar, dock, and keyboard. Additionally, Touch Bar controls will appear at the bottom of the iPad screen when using Sidecar, even if your Mac doesn't have a Touch Bar.
Using Adobe Illustrator with Sidecar and Apple Pencil on an iPad Pro
Photo Credit: Apple
Apple claims that “developers don't need to do anything for Sidecar — it just works.”
That said, those apps that offer advanced stylus can make use of Apple Pencil's pressure and tilt features, and can also customise what a double-tap on Pencil's side does. Apple has listed a total of 15 apps on its site that will likely offer advanced features, including the likes of Final Cut Pro, DaVinci Resolve, Motion, Sketch, Cinema 4D, CorelDRAW, Affinity Designer and Photo, and the aforementioned Illustrator.
Sidecar will only be available on Mac machines that can the newly-announced macOS Catalina, releasing in the autumn as a free update. Apple says all Mac computers introduced in mid-2012 or later will get Catalina, which will also bring about the replacement of three new apps, bringing voice control for added accessibility, and introducing Screen Time among other new features.