You already understood it’s a Hoax. But, let’s consider it is not:
Why is it a bad idea ? All Linux Desktop have perfect compatibility if you know how to
make, make install stuff :–)
On the other hand, imagine that: Debian is the biggest of all Distros. So … Canterbury distro, means that Debian gets tons of new maintainers and new ideas, and in two years from now, Ubuntu’s #1 bug is SOLVED !
And finally, one last thing to consider: Canterbury distro is Open Source. If the people behind it would fail to organize and turn their ideas into a well working system and organization which allowed people to exchange ideas without flaming each other, there is always the option to fork Canterbury, and revive Debian ;–)
I hope my answer helps you deal with your fears for Debian’s future.