Sure, PV exports to "the grid", but practically speaking you are reducing the power requirements for your local area. Since peak demand to the area is lessened, utilities get to defer infrastructure upgrades, thus saving money.
Until there is enough renewable generation that you're actually reducing or eliminating their profits on the fixed-cost of generating equipment they have in play.
I think that's the concern. It was all, "Ha ha look at solar, how cute and expensive." Now its more, "Its going to eat our lunch." and its only getting cheaper year by year.
