Bring in other applications, calendar, notes. Tap on divider and get SplitView. Multi-app, multi-touch. New task switcher, full screen previews of apps. Finger-swipe from the slide brings in an app, "SlideOver"
As on every Samsung Tablet (and their flagship phones with larger screens) since 2013...
Of course back then this was called useless gimmicks that no-one needed since it is only possible to do one thing at a time...