X11 is not a window manager. X11 provides the low-level API for drawing to the screen and for interfacing with input devices. Metacity (GNOME), KWin (KDE) etc. are window managers. IIRC, X11 does offer a very basic window manager, but nobody actually uses that.
A new window manager shouldn't be a problem. If it behaves properly, you will hardly notice the difference.
It will actually be interesting if they manage to replace X11. AFAIK, many people hate X11 to the core. Heck, the Qt and KDE developers refuse to work around X11 bugs, hoping that pressure from users will somehow cause the X11 devs to fix them. Of course, I don't know the full situation, since I stopped paying attention to politics in the Linux world a while ago.
A new window manager shouldn't be a problem. If it behaves properly, you will hardly notice the difference.
It will actually be interesting if they manage to replace X11. AFAIK, many people hate X11 to the core. Heck, the Qt and KDE developers refuse to work around X11 bugs, hoping that pressure from users will somehow cause the X11 devs to fix them. Of course, I don't know the full situation, since I stopped paying attention to politics in the Linux world a while ago.