Your comment generally shows a lack of understanding about the concepts you describe, and I really don't say this to be rude in any way, but I think it would be more helpful if you don't try to explain these things until you understand them better yourself, because it confuses people more than it helps them. Specifically, I have to point out this which is completely wrong:
"To the 'core' of Ubuntu, they tie things, packages. They are getting rid of (for now) Gnome and replacing it with Unity (except for Edubuntu) Ubuntu Is now Gnome. (Kubuntu is Ubuntu built around KDE) Gnome, Unity and KDE are 'desktop' environments."
They are not getting rid of GNOME, they are getting rid of gnome-panel+metacity, which GNOME itself is getting rid of too. GNOME's replacement is gnome-shell, Ubuntu's replacement is Unity. Unity and gnome-shell are both graphical shells FOR the GNOME desktop and not complete desktop environments; if you removed GNOME from Ubuntu, you would not have a functioning desktop environment.