Re: Apple didn't invent those
Not Xerox, they didn't have menubars back then, and title bars were buttonless and clearly the inspiration for BeOS, I suppose it's possible that someone other than Apple created them but it seems unlikely that there's anything out there with those features that predates Xerox.
How about drag and drop, or being able to browse the filesystem? filetypes? updates to background / obsured windows? The thing about obvious ideas is that they commonly only become obvious the moment after someone has created them, there are billions of obvious ideas out there right now that represent untold fame and riches, realising them and making them work is hard, being labelled 'obvious' later is essentially the hallmark of fantastic ideas.
I guess I just find it disparaging when a whole load of original work is written off simply because it uses the windows and mouse concept from Xerox, the Apple developers didn't leave there with disks and code, just the basic idea, the concepts they added which have spread to all GUI's should be recognised just as much as the work of Xerox's developers in creating the basis of the modern GUI.
Back to the article, regarding NextStep , I recall a whole bunch of Docklets being ported over when OS X was first previewed, which were basically active notification icons, clocks, volume control, CPU usage, weather etc, most of these had menus attached to launch or change something, they fell out of favour so most of them are long gone but some degree of this remains in OS X with unread mail counts on the Mail.app icon, date on the Cal app etc.