Can someone explain to me what this is for? The article explicitly mentions that it is not intended to emulate a machine like bochs/vmware or running windows on linux...

So what is this for? Everyone I talked about this subject or use it to run windows apps on *nix ( osx included ) or to create multiple servers in a single machine. What else a hypervisor can do?

EDIT: for the people pointing me the motivation section... well, that is the section I am quoting in first place.

I did read it, but the guy is awfully vague.

And I never used a hypervisor before anyway, thus you can't assume I will understand random jargon.