It's really amusing to me that FreeBSD Jails have existed for quite some time already. I think the novelty though is "shared configurations" and shareable environments that are not VMs.
Right now "cloud" stuff is looking a lot like Subversion back in the day - I'll love it when the "distributed cloud" arrives (mesh networks are kind of the first iteration of that but they won't catch on until more people have fiber internet and there comes a commercial use for it like what Kickstarter did for crowdfunding).
[EDIT] The downvote trolls have been out recently - this guy has a legit comment; it's not detracting and it provided an interesting point of discussion that I myself took up. There's no real foul in his comment.