Solar power on top of houses make sense. The real estate isn't being chewed up.

I don't think there is enough desert to make up for voltage drops in long distances. Not to mention that so much land needs to be used. So what do we choose feed humans, biodiesel or massive solar farms.

Also strictly speaking just like fission, solar energy isn't a renewable resource. The sun will die out sometime... just a lot longer then other power sources.