Well there is such a lot of sunshine energy going begging in some countries that it seems like a good opportunity to supply to the local grid, but for us in the UK since wind and solar power is not tenable, power stations it should be - I favour coal and nuclear.
Agree in spirit, but what's the point of generating (hideously inefficiently) electricity to convert into heat?
What's wanted is a resonably benign salt with nice high latent heat and a melting point of around 85º (higher would pose problems with working fluids). Stick a couple of cubic yards in the cellar with LOTS of insulation and heat it from thermal panels (with, if necessary, heat pumps run off solar electricity). Most of the bits are off the shelf, so it might work OK in cases like my flat which is all-electric. Only trouble is, I haven't got a cellar!
Forrest Whitaker narrates a commercial for IBM discussing exactly my supposition above about the power lines acting as data communication lines and making the environmentally safe power options viable.
He conveniently leaves out the need for the cutoff switch the the grid needs to make the power control system work. i.e. the remotely operated switch which shuts off your AC when you need it.