Following the decision for Debian to switch to the systemd init system, Ubuntu founder and SABDFL Mark Shuttleworth has posted a blog entry indicating that Ubuntu will now follow in this decision.
'Nevertheless, the decision is for systemd, and given that Ubuntu is
quite centrally a member of the Debian family, that's a decision we
support. I will ask members of the Ubuntu community to help to implement
this decision efficiently, bringing systemd into both Debian and Ubuntu
safely and expeditiously.