Pretty interesting reading even if you don't care about being on the grid, but the technology is there to be able to get power in places where it couldn't be done before and without having to put up a bunch of poles and wire to do it. I'd heard about them planning to put up massive solar arrays in space and beam the power back to earth so was doing some searching on that when I found the below link.
On Grid Via Microwave
As far as I can tell there wouldn't be any way to sell unused electricity back to the grid though. Needless to say unless you have an over abundance of solar, wind turbines and huge banks of batteries though this would be a good thing. It would only be backup when you need it without having a backup generator (which would also cost and pollute even if you were trying to be green as possible.) Actually with wireless technology I don't see any reason power, phone, internet and TV couldn't all be provided about anywhere including all of Terlingua Ranch! (Without the use of satellites) Will be interesting to see how long something like this takes to be a reality.