Oh that is very cool! So iPad Air 2 can at least
view 3 apps at once (2 inactive side by side apps, 1 active floating), whereas iPad Pro can interact with all 3 of them
like this (2 side by side, 1 floating). Well it's actually 4 apps if you count PiP video.
Also that YouTube video upload via drag and drop around 4:42 is super neat!
Edit: Btw I'd suggest merging this thread with
this