120hz refresh rate does not by itself create the fluid video-like picture that the original poster is referring to; it just displays frames for video sources twice and (hopefully) displays frames from 24fps sources five times. This would look no different than watching a 60hz display or going to a movie theater respectively.
Now, if you combine a 120hz display with AMP or a similar technology, you then get the video-like picture that some desire to have.
If you want to re-create a cinema-like experience, you need to have a 24fps capable player outputting to a 120hz display that does a 5:5 display of the original frame. You would turn off AMP in this case.
If you want to alter the original film to look like video (actually twice the fps of video so even more fluid) then you would turn on AMP to have your display generate extra frames by interpolating the movement of the original picture and creating more fluid and lifelike motion. I personally don't care for the effect, but it is an interesting concept if nothing else.
To add to your list:
Transformers - attack on the military base at the beginning of the film and the freeway chase near the end - slomo shots with AMP might be pretty cool
Serenity - space battle near the end of the film
Batman Begins - the training scene on the frozen lake - white background with dark armor on the actors
300 - high contrast with the crushed blacks in the film and the slomo shots could be cool