Imagine a movie theater with a screen that's a DOME.
Like the screen goes over your head and behind you a little bit. So everywhere you look there's part of the image.
I saw HUBBLE at one the other day, and it was CRAZY in the parts where they're like flying through space showing you the stars and stuff. You legit feel like you're flying.
It would be crazy if they showed something in 3D in one.