systemd is not better than init for any use right now. My guess is that it is unlikely to ever be, but predictions are hard, especially about the future. As far as pulseaudio, it's basically a bloated version of esd, which was another project trying to solve the same problems that also sucked.

I'm taking a "wait and see" approach to Wayland. Clearly X needs to die. Many times before people have tried to kill it and it's still here; Wayland seems to have a lot of backing though.