I'd like to read up on the technical docs. At first, it looks like a Docker rival. One of the concerns I have about LXC is that it isn't using hardware paravirtualization. It seems like that is what Ubuntu is trying to do with LXD (that is, LXD provides a hypervisor backend for LXC), but I am not sure. If this, then that's a much more compelling argument for me to use LXC over something like VirtualBox or ESX, or whatever.

Then again, maybe I don't understand how LXC work at all.