Sometimes you may take a screenshot of something pertinent to your schematic or layout, and want to include it there.
Currently, you need you save this screenshot somewhere, then Place → Add Image, and navigate to the saved image file.
I think a nice way make this a little faster would be to support pasting images from your clipboard directly into the schematic or layout. I tried this in v8.0 RC 2 and it doesn’t seem to support it.
A good number of websites and apps support pasting images from the clipboard, so I think it’s a behavior that users could tend to expect to work.