London has a suprising industry in fim production, specialising in big budget Hollywood movies. I think it's used more than California, or anywhere in North America ...except for the state of Georgia (no 1)... so Atlanta film production over LA?
Antwerp - high end fashion on a par with Paris, Milan, London, NYC, Tokyo.
Beijing and Berlin have unseated Silicon Valley as the world's top tech hubs:
https://www.forbes.com/sites/chynes/.../#e59cdca7acf2
Beirut and Belgrade for nightlife
Houston has the worlds largest concentration of healthcare and research institutes
Johannesburg - the largest 'dry' port in the world
Seoul - 7th most visited city in the world, more than NYC, and 4th largest tourist earner.
Singapore - worlds most visited city beating traditional title holders Bangkok, London and Paris (if counting daytrippers). For overnighters it's Bangkok no 1, London/Paris 2.
Athens is fast becoming one of the world's largest ports after being bought by China, as the gateway to Europe. Piraeus is now the worlds second largest passenger port, and Greece owns the world's largest shipping fleet.
Mexico City has the 8th largest city GDP in the world (2015), and the city proper (8 million) has a First World human development index on a par with S Korea - it's one of the biggest centres for luxury goods.
Jakarta - high end property investment - the global leader in returns in 2014