The quality of movement in cinema (film) is formed by these characteristics:
Global shutter with smooth in-out
Projection Speed 1: 1 (not pull down)
Acceptable number of frames (I think 24 is the minimum acceptable. No one creates wine tasting arguments to defend 20fps)
24p and 1/48 expose are standards for projectionists, camera manufacturers and filmmakers to talk each other. If the standard was 30p it would be a little better, but with higher costs for film, development, print, copies ...
In digital, global shutter is possible, and solves movement much better than rolling shutter. The smooth in-out, made by the mirror in a plane away from the film, is another of the mechanical and chemical wonders that we lost when embracing the digital facilities (there are exotic solutions, like the mirror in alexa studio, the old tessive time filter .. .)
Now, 1: 1 viewing is a mess in digital. There was the old standard 24p, but for TVs they created the 60i and 50i. For electronic devices, monitors, phones ... 60p.
Even TVs that can offer the true 24p, depend on the signal being sent that way. I heard that with NVIDIA Shield it is possible to send the 24p signal from applications like NetFlix.
TVs that offer 120Hz, usually like to meddle and alias movement, and sell as if it were “incredible", and often, turning off all features still offers an image with signal intervention.
That said, the 30p manages to meet 1: 1 in almost all cases, except for TVs in Europe (and maybe other places in the world, I don't know). Little cost involved (25% of storage). Improves movement, without making it clinical, like 60p.
1/48 expose, if there is no smooth in-out of the mirror indicating the trend of the next frame, I think very little. It creates a very large gap that the digital with its implacable cuts only worsens. Here I still prefer a bigger exposure (tests in progress). Less than 360o and greater than 180o.
More frames (30p) and a larger aperture (maybe 1/48) also softens the effects of rolling shutter. But for me this is one of the unacceptable characteristics of digital. And I think that's what the friend said that hollywood has less of that jitter effect