As solar panel efficiency is improved, our appliances and devices that consume electricity also become more efficient so that there's less demand.

Photovoltaic technology has been around for a long time. There's big money in making it more efficient....and we still haven't improved that much. Higher efficiencies are usually the result of using more exotic materials and/or construction methods and the cost increases substantially. The trade-off is usually less efficiency but at much less cost so that the break-even point is 10 years out instead of 20 or 30.

No more timeshare offers please. My cynicism is firmly back in place.