Besides the obvious possibilities (and implausibilities) of using something like this as an interstellar weapon, I wonder just how hard it would be to use a laser star to transmit general purpose power to, say, your home system, as a way of edging towards Kardashev 3, a really scaled up version of beaming power to earth from orbiting solar cells. Does such a concept work at all, in terms of real numbers, for a sufficiently patient society?