There are good CMS's out there besides WordPress, but it's hard to compete with the quality of WordPress community, that's what made WordPress so popular.
I hope it will only continue to grow in the coming years.
Agree. I love Joomla! but I need to say WP provides something that user really loves: easy-to-use administrator.
I think Ghost is closer to compete with WP more than any other CMS.
Ghost is for blogging but remember that first WP versions were for pure blogging.
Let's see how the users reacts to the new CMSs.