>> we have to use Wayland instead of X11, because X11 is impossible to secure.

Yet X11 was designed in the prime example world of a mult-user OS, UNIX. Hmm.

>> We also need to use kdbus to allow desktop integration that is properly filtered at the kernel level.

Didn't I read an article on HN recently talking about a vulnerability in Windows and the subject of too close a relationship between the kernel and the end user graphics came up?