One of the most obvious changes to human society would be the drastic increase in productivity. Certainly, not everyone would suddenly decide to work for 16 rather than eight hours, but there are those driven people who would love to have more time each day to keep working. Think of how fast science would progress if all of those people were able to essentially double their daily productivity. Things that used to take ten years to develop would only take five.

Now before you imagine suddenly earning twice as much money each year, there may be an issue with this. This would only work if not that many people decided to work the double shift available. If most of your fellow citizens all had the same idea then the reality is that most of the prices would rise and you would end up paying about double for the same things. Sadly economics is against you so you would want to ensure that most other people were not working 16 hours a day. In fact, one of the major impacts of no sleep would be economic, it would take economies a number of years to deal with the massive changes this would create.
This could well be the case though, as it is unlikely that most people would want to spend 16 hours a day working. Just think about how long a day at work that is! 

Another point made by experts is that humans need downtime, so even if we weren't sleeping at all we would need some time relaxing. The brain works best when this happens, which is why the best ideas come to you in the shower or when you are lying in bed. 

So yes it would appear that while for some there would be a drastic increase in work hours for many of us the chances are that we would end up having an increase in free time. If we had an extra eight hours we could spend more time doing the things that we love, whether that is playing or getting into that hobby that you have wanted to do for so long but never had the time.

Now with a whole 24 hours in the day, we can live a more flexible life, you can choose to do your work during the night so you can have the whole sunny day, you can choose to do your week's work from Monday through to Wednesday and then have the rest of the week off. 

There are lots of different ways you could live if you didn't need to sleep.

Yassias and thank you for listening