After watching the WWDC announcement I think I’m asking the question on everyone’s lips: Will the desktop/website version of Skritter work with Apple Pencil while using the iPad as a second desktop display through Sidecar?
Please make sure that it will! The feature is described like this:
macOS Catalina has a useful new Sidecar feature, designed to turn the iPad into a secondary display for the Mac. It can work as a traditional second display or with a mirroring feature. Apple Pencil support works with Sidecar, so you can turn your iPad into a drawing tablet using apps like Photoshop.