Organizers expect some 350,000 people through the doors of GamesCom in Cologne, Germany this year. It is one of the largest video games conferences in the world. It's a chance for gamers to check out the latest instalments of the games they love - and a chance for businesses to talk, compete and collaborate. Gaming is a massive industry these days: by some estimates, the sector could be worth something like $138 billion by the end of the year. Now compare that with the film industry, which is projecting its total box office revenue to hit $50 billion or so by 2020. Let's take a look at what's hot at this year's GamesCom.

E-sports is the buzzword. Gamers are getting active. This is a qualifier for the Just Dance World Championships. Anyone's welcome. Hundreds of thousands of people have come. To check out the latest installment of their favorite game. They're prepared to wait many hours.

"We got an ESL team - and we don't play casual - we play competitive. Yeah, we're here to win."

Away from the main halls, perhaps tomorrow's big names. Virtual reality still forms only a small part of the sector. But it's growing rapidly.

TIMO FALCKE VIRTUAL REALITY GAME DEVELOPER "You as a player have the task to construct your own space port our of blocks and defend it against enemies.

"Yes, that's a trailer of the game - mixed reality. You see the station floating in front of you in VR and you just build and fill the whole room with your structures."

You don't get to build your own virtual football stadium yet. But the all-new FIFA 19 - out at the end of September - comes complete with Cristiano Ronaldo in a Juventus shirt and another chapter in its latest feature: following a player through their career, not just a team through seasons.

"I have played FIFA since 1999. To test - to build my opinion on how the game is played, what is new - it's fun."

For a few days only: virtual worlds converge to form this reality. The characters are colorful - the playing, in many cases more active and more and more immersive.

GUY HENDERSON COLOGNE "So a highly entertaining format but on a more serious note, the World Health Organization this summer recognized gaming addiction as a mental condition for the first time. To talk about that we're joined by Dr. Jan Dieris Hirche from the German government-funded Oasis clinic which partly specializes in treating patients suffering gaming addiction."

GH, CGTN, COLOGNE.