Debian doesn't use Upstart and RHEL 7 will be using systemd (it was confirmed in Red Hat summit 2012) and it's going to be released in 2013. Mageia and Mandriva have also already switched to systemd and Arch Linux and Chakra will be doing so shortly. systemd is very modular and designed to work well in embedded systems and servers and not just desktops. To my understanding it was first adopted by embedded systems and it's now part of GENEVI core platfrom so it's supported by numerous different distributions including Ubuntu IVI. It's also part of both Mer and Tizen mobile Linux operating systems.