Should I have solar panels installed on my house now, or should I wait for the technology to improve?

I live in Southern California, and I have been considering solar panels for some time. I’d love to air condition my house, but I’m not willing to do so until and unless we come up with an alternative energy source. I’m somewhat anxious to go ahead with the solar idea. It seems, though, that the technology is changing rapidly. I wonder if it would be smarter to wait.