I don't think the government will do anything until we're almost out of petroleum and are in a total panic.
It's probably going to be a lot like Laser Eye surgery.
When it first came out, only the rich could afford it @ $5000 per eye, could only fix one type of vision problem, and it wasn't covered by health care insurance.
Doctors realized they could make an easy $5000 an eye, so more doctors started doing it, and more money was put into research, and they could fix two types of eye problems.
As people started shopping around, doctors starting dropping their prices. Soon enough, prices came down to the point where more and more people could afford it, and with the extra resources, they were able to now correct three or four different eye problems.
Now it's cheap enough that most people can afford it, and it fixes more than the one problem it originally could.
Ironically, this is also the solution to our nation's healthcare problems. Nobody sees how much their Insurance companies are paying for the services of something as simple as a check up, but if we were forced to "shop around" for doctors and procedures, the cost of healthcare as a whole would drop.
As this relates to energy:
If someone gets solar panels installed on their roofs, their neighbors will hear about him getting "free" electricity, so he doesn't have to pay to fill up his electric car, he gets to keep the house cool all the time, and run his appliances, the next guy will want to do it, too.
I don't think the government will be handing out free solar panel generating units, they aren't going to hurt all the taxes and other revenue they get from the ga$oline indu$try. Can't tax the sunshine!!