Wayland on X probably doesn't really count, if you are talking about kernel display interfaces. X is not a kernel display subsystem.
And I've tried kmscon recently.. it is pretty nice actually, and way faster than fbcon, and supports hotplug. And I suppose some people would appreciate the possibility for proper support of unicode. But I guess one person's NIH-ism is another person's moving-on-and-creating-something-with-modern-features-ism :-P
Obviously it won't be an overnight change.. fbdev won't be removed soon. But the current situation of two display subsystems is not ideal. So it is best to start nudging things towards KMS.