This was a different experience in 1956.
Seeing it in big screen 70mm Todd-AO must have been something. That's a kind of curved, wrap-around screen, so it's something like Cinerama. It had a super wide angle lens capability that gave up to 128 degrees for a field of view.
I think part of the 'action' in this movie was provided by your own eyes looking over all the scenery on the screen.
Also 6 channel stereo sound.
It was meant to give people something they couldn't get on TV.
Also, numerous cameos that people today don't recognize, so they mean nothing.
Cast of thousands; not CGI people either.