It already is for those that can afford solar, make it a lot cheaper and I will be in hog heaven as I power all of my luxurious heating and cooling and lighting that I want in my own little personal paradise, without have to worry about catastrophes, national emergencies, and personal income fluctuations.
The simple fact that it is still too expensive means that it is still not even close to being a viable option in the vast majority of situations.
Personally, I too would like my own personal quiet and clean little cold fusion reactor purring away in my basement.
What we would like, and what is dictated by efficiencies, technologies and economics are two very different things.