Not much of this actually makes sense to me because it seems all self inflicting. Meego is common core you say but what "core" was it? was it a UI/GUI or was it an OS?. <snip more nonsense>
Device drivers are either integrated directly with the kernel or added as modules loaded while the system is running.
The graphical user interface (or GUI) used by most Linux systems is built on top of an implementation of the X Window System.