I'm getting the feeling they've picked an agenda and a direction and going hell-for-leather, dragging the Linux kernel and the X.org framework in their wake.
I got rebuffed in my Ubuntu bug about the intel driver not supporting "zaphod" more anymore (this is where you load the driver twice and it gives you :0.0 and :0.1 instead of just :0.0 that spans both monitors). :-/ It seems Ubuntu doesn't think it worth passing upstream.
Wade.