My only concern is that last time I looked Wayland wasn't ready for primetime, and the intent with Wayland wasn't to be a full replacement for X for most users.
If Mark Shuttleworth was proposing Wayland for prime-time inclusion in Ubuntu 11.04 or even 11.10, I'd be concerned. But if you actually follow this news story to the original source at http://www.markshuttleworth.com/archives/551 you would find this:
Timeframes are difficult. I’m sure we could deliver *something* in six months, but I think a year is more realistic for the first images that will be widely useful in our community. I’d love to be proven conservative on that
So the first likely viewing of this would 11.10 and real integration into the entire stack is more likely in the 14.10/15.04 time frame.
So this is a classic storm in a teacup right now. The reality is "promising project will be supported by major Linux player for future inclusion".