They're not the same thing, and there's currently no lunch eating going on. KVM is a full hypervisor. It can run Linux, Windows, OSX, Solaris, etc. Docker on

They're not the same thing, and there's currently no lunch eating going on. KVM is a full hypervisor. It can run Linux, Windows, OSX, Solaris, etc. Docker on Linux can run Linux. It can do it with less overhead and higher performance than KVM.