Not the desktop because that’s typically obscured. I know many people who never have used, probably never will use, the show desktop feature of an OS.
– the underlying assumption is that a panel (with a tray) is reasonably close to ever-present. Exceptions:
- full screen mode, during which I don’t imagine anyone pulling the plug on anything and in any case it’s inappropriate to disturb full screen mode e.g. video playback with a sign of media connectivity
- screen saving, with or without a lock.
An eject icon will probably be fine.
Without turning to Windows at this moment: when I think of the countless times I have used the OS to gracefully eject media over the years, I’m vaguely aware of the icon being colourful. Probably green. I can’t recall whether it’s symbolic … if it is (a rectangle, maybe?), it was never large or symbolic enough to be memorable. What’s memorable is that it’s colourful.