People were fine with 24fps for a century, on huge screens with 4K resolution (35mm). The trick, you perceive smoother motion at lower light levels. A movie theater screen is calibrated at 14 fL with no ambient light. That's 48 nits. TVs before HDR would already be in the 150 nit range in a daylight setting. Now with HDR they can go up to 1000 nits. The other trick is to show each frame twice, 35mm film runs at 48hz. 48 black frames in between to trick your mind into believing it's smoother than it is. TVs don't do this, they simply show 24fps without any back in between, (Perhaps some tvs have proper 24p display modes nowadays, I don't know)
I noticed the effect myself a lot while switching between my 1080p projector (at 15 fL) and 1080p tv (at 40 fL). Movies look a lot more smooth on the much larger screen, due to the lower brightness. Turn HDR off, the lights off, and lower the brightness to get a smoother picture.
The movie industry is all made around 24fps. Lighting, motion guidelines, everything is calibrated for 24fps. That's why the 48fps version of the hobbit look so unreal. The lighting did not fit the frame rate.
Anyway it doesn't really matter to me. You get used to the frame rate after a couple minutes. There are much bigger problems with modern movies. Too much cgi, lens flare, shaky cam, tacky color filters, bad lighting, too much action, too many one liners, crap story.