I think what was impossible before the electric lights is to watch TV because it is the only thing that electricity makes TV turn on. If there is no electric TV, it does not work, we would not be able to view the TV because the TV to power on the mechanism works and the resulting video and audio, we see and hear. In addition, use of air conditioning, they need electricity. For temperature control, as we want to. If there is no electricity, they could as well.