It was a very clear and intuitive explanation as well. I was most intrigued by their optical system used to encode and decode light structures in space and time. Though, I didn't quite understand their discussion of 4D holograms at the end, they seem to imply that we can now achieve actual 3D holograms of images using time-reversed light waves and also have these holograms move over time?

Edit: the author has a longer video with timestamps[0] as well, perhaps the details and implications are discussed there.

[0] https://www.youtube.com/watch?v=9hVEJvfWjRQ

> I found the ~6 min video embedded in the article worth watching.

This is very good advice. They also have an hour long presentation as well. I haven't watched it yet but I plan to. That 6 min clip was fantastic.

> If I'm understanding it correctly, this technology could ultimately provide a means to generate very realistic holograms (after many iterations and lots of capital investment).

Well, they first used this to disrupt kidney stones but there will be numerous applications to this. Being able to model and control light in ways that we never have before opens up many fields.

Agreed. That was really well presented in my opinion.