They modified the marketing a bit because of a lot of public ruckus (and even added a disclaimer lol) but the original website clearly stated the intention was

They modified the marketing a bit because of a lot of public ruckus (and even added a disclaimer lol) but the original website clearly stated the intention was (and is!) to create a "30-45 million people smart megacity", "a European version of Hong Kong or San Francisco" using what currently are the Netherlands, Belgium and the Ruhr area in Germany as the location. https://www.tristatecity.nl/ https://www.tristatecity.nl/