I would argue that the best way to consider the impact that electricity has on life today is to imagine a world without electricity. In certain parts of the world, strain on ageing infrastructure has forced authorities to implement loadshedding, which is essentially planned daily power outages. Take a moment to imagine what life is like under these conditions: not only are the lights off, but it is impossible to carry out everyday tasks like cooking, running a heater or air conditioning, doing a load of washing, or charging a cell phone. While loadshedding lasts only a couple of hours, it provides a glimpse of what life would be like with no electricity.
Electricity has a massive impact on life today, and it has made just about everything that we take for granted possible. Even having running water in our homes relies on electricity. Without electricity, there would be no emails, no cell phones and no internet. The business world would look completely different, and there would be fewer careers and fewer opportunities to earn a living. Electricity makes an infinitely faster pace of life and work possible. We are accustomed to being able to send an email to anywhere in the world in a split second or pick up a cell phone. In a world without electricity, however, you would have to send a letter that might take several weeks to reach its destination.
Thinking about the bigger picture, I would argue that electricity increases life expectancy, because it makes the work done by doctors and nurses possible. It allows security systems to be run, which makes the world a safer place.