The motion picture film is still exposed at 24fps but what we're seeing is now 48fps in the theatre, motion blur is still the same, all we're missing is the "flicker".
Some people can see this flicker at 24fps, I'm one of the many who cannot see it. But I used to work with 8mm film and at the frame rate of 18fps I remember seeing a definite flicker effect.
So I work largely in 29.97 progressive because I don't want that small percentage who see 24fps "flicker" to perceive my work as "choppy and stuttery". So far I've seen no comments of such.
24fps is no longer needed like it used to be. It's an "archaic" holdover from the film days when the rate at which film was "consumed" was a very important economic consideration (price film and processing costs nowadays!). Many in the industry are looking forward to video being done at 60p as a norm someday, and not for slow motion.
I often render my video out at 1280x720 60p (one of the render settings offered in my NLE) for the "smoothing" effect of the faster viewed frame rate.
I really don't have a "dog in this hunt". I don't care what gear they use on their film. Each one of us will use the gear we feel the most comfortable with or what our budget allows and that's the way it ought to be.