A lot would change, any sleep related products would not exist, hotels, sleeping accommodations, work times would differ, more would be accomplished.
Homes would still exist, they would still have the same layout as ones now, still have comfortable areas, however beds may not be called beds, at least furniture may have different ergonomics to a bed, as you will not need to lay flat, it would seem useless to do so as you will not need to sleep/rest even, however you would still require the comfort.
Street lighting may be increased; unlike us, the majority of people sleeping at night, lighting is not that important in a world with most of the people sleeping, however if all the world was to stay awake at dark, perhaps lighting would be altered somehow to mimic day, thus make things easier.
Family life would change, babies would remain awake all day long.
As for the world, I would see more being accomplished, policing would be constant, thus reducing crime, nevertheless crime itself may increase.
Nothing big would change, we would be the same, there would still be politics, crime etc, we would just address things much more effectively.