We can answer some of your questions about how trackpad support will work today and we’ll get a chance to actually use it ourselves in the public beta. In the meantime, here’s what we definitely know about how it will work based on videos Apple has released publicly and on a video presentation given to reporters this morning.
Bohn gives a great bullet-point walkthrough of how iPadOS handles input from a trackpad or mouse, complete with the roster of navigation gestures supported by trackpads.
Best of all, however, the article includes a video Apple created in which Craig Federighi, Apple’s software head, demos the trackpad on the iPad Pro’s new Magic Keyboard. Presumably it’s exactly what Federighi would have done if the company had been able to introduce the iPad Pro at a press event.