Although, as William Gibson once said, "The future is already here — it's just not very evenly distributed". And this has always been the case. There is a difference between when something is available and when it is commonplace. While electricity was technically available in the late 19th century, even in 1930s America it wasn't available in most rural areas yet -- hence the Rural Electrification Act of 1936. And of course there are places, mainly in Africa which still don't have electricity.