Waiting for systemd-kernel
* UUIDs instead of process IDs
* a "systemctl top"
* closer integration with GNOME Terminal, in particular its PTY helper
* several PAM tweaks that, taken together, I suspect will eventually lead to a PAM replacement
But to be fair, most of these systemd-[something] (sub)projects are part of "systemd", but not the systemd init system, which are different, apparently.