The beauty is that you can adjust it to be useful to you, be it when taking notes from a video, dragging files from one app to the other, QCing a social media post with all 3 windows showing the diff. networks etc... It helps me with work and personal things.
I remember when people didn't think smartphones would be very useful until they got one, then they thought GPS wouldn't be useful in a phone, until they got a phone with one. Always great to see what people realise when they actually get the feature.