Giant 3D wave sweeps over Seoul's Gangnam District
https://edition.cnn.com/style/article/3d-wave-in-seoul/index.html
That 3D screen can be a tourist attraction. So, people may gather at the site to see the screen.
But, if it entertains people with boring lives, it would be better to show 3D wave.
I don't know which factor is bigger than the other one.
