As far as I know they want to switch the normal Distro too.
HOWEVER, quote from Mark form his "blog/website":
Originally Posted by mark
Itís highly unlikely that the default Ubuntu install in a year will be on Wayland. Itís possible that there will be versions of Ubuntu that use it, or proof-of-concept images, by then. More importantly, we wonít make it the default until it really is widely supported and supportable, by folks using a wide variety of hardware providers. And as for network connectivity, thereís sufficient time between now and then for these problems to get solved.
So it want be a fast switch...