We will see a resurgence of blimps following regular routes, used to tow flyers. People fly up to the blimp and grab a hook. They hitch a ride until they are near their destination, then fly down.
Floating platforms will be great places to hold parties, mobile rock concerts, etc.
Imaging a performer surrounded by a flying sphere of an audience. No need to build arenas and many more people can get a "seat"!
Water quality will improve. People in areas with polluted drinking water can fly up to a cloud with a refrigerated jug and condense some water before flying down. (The amount of water gathered equals surface area of cold item times velocity of flight times time. The water is purified using graphene filters. Graphene is a nanometer scale, hexagonal grid, carbon mesh requiring ten times less energy to purify water than previous technologies.)
As pointed out, the concert idea needs more development. Considering how mosh pits and dance crazes develop, I believe that participatory synchronized flying will become a huge industry. A spin class today can accommodate a few score of people at most, so not worth the while of a celebrity to lead them. But in the sky with 3-dimensions, a celeb could lead a class of thousands and rake in big bucks. Thus you will need 3-d trained bodyguards. That will be another growth industry.
As for gathering water from the clouds, the world will develop a large scale, floating infrastructure to act as waypoints for the flyers. Floating shopping malls, restaurants, etc. These semi-permanent places will handle the messy business of harvesting the water for us.
People can walk, but use bicycles to go faster and farther. People can swim, but use flippers. Thus a new industry of flight-enhancing technologies will spring up. Jetpacks, glider wings or parafoils, small prop engines, the works. This will extend the range of flight, permit resting before resuming flight, etc.
Aeoroponics will flourish, to supply food for the lofty crowd close to where they need it.