The worlds fair seems as big as it has ever been. The Dubai Expo 2020, which concluded last month saw over 20 million visitors in 6 month. This is twice of what any Disney theme park can perform.
I don't think Al Wasl dome will be the new Eiffel Tower, but I am pretty sure it will become a permanent landmark to Dubai.
The article even says so much:
> Outside of the U.S., particularly in Europe and Asia, world’s fairs remain popular. In cities like Milan, Dubai and Shanghai, host nations have used these grand expositions to express their guiding values and show off the very best of their countries to the rest of the world. Today, this mission is more vital than ever
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> Despite their diminishing popularity in the U.S., world’s fairs continue to take place across the globe. They remain popular for the same reasons they were in 1851: Simply put, fairs act as powerful affirmations of national identity that reassure host countries and dazzle international audiences. In 2010, an expo in Shanghai welcomed over 73 million visitors to the largest world’s fairgrounds ever, spanning a staggering 2.5 square miles. Delayed due to Covid-19, Expo 2020, in Dubai, concluded less than a month ago with a spectacular closing ceremony. The fair hosted more than 24 million visitors over its six-month run.