CentOS/RHEL 7 uses systemd. That's a notable change. Also, LXC and docker should work out of the box. And xfs now instead of ext4 by default. Release notes:

CentOS/RHEL 7 uses systemd. That's a notable change. Also, LXC and docker should work out of the box. And xfs now instead of ext4 by default. Release notes: http://wiki.centos.org/Manuals/ReleaseNotes/CentOS7 http://wiki.centos.org/Manuals/ReleaseNotes/CentOS7