When I was a kid in the 90s my parents took me to some sort of art gallery hidden upstairs above other shops, that was doing a hologram exhibition (wavefront holograms, not specular ones like in this article). It was dark inside and they had a whole lot of amazing large format holograms of various things lit up.

I kind of wonder why holograms of all types aren't more popular. It's still amazing to see a 3D image on a 2D plane that you can look at from different angles.