Solar energy? "Cool"!

When will we be able to put solar panels on our roofs? When would it become economically viable? I have started to see many changes in this area (see recent article on the San Jose Mercury News) and I wonder if my house in a couple of years will be energy self-efficient. Can you imagine? The ability to create your own energy from the sun?

I believe that in two years from today having our own energy will be “cool”, like owning a Prius was a couple of years ago.