I thought that more than half of our electricity is generated by fossil fuels and/or nuclear? All of our appliances are electric but we heat with propane, and don't have central air. I don't see us being able to change that anytime soon. I really like the idea of home solar but I'm not giving up my trees - they really help with summer cooling. Still, I don't see how switching from gas or oil to electric is going to help that much overall, if we just use more fossil fuels to meet the increased electric demand.

edit to add - just saw Catherine's chart - good info!