So it's a hack that makes fine-grained privilege escalation possible on Windows, without fundamentally fixing the problem. I don't think Unix will ever need to implement something like this. On Unix, we can do this the right way with PolicyKit. We don't need popups to log in as a different user for a particular action.
I'm a bit curious though why Microsoft would feel the need to patent this. It's not really an invention. It's an ugly hack, with little chance of being copied.