People turn off interpolation not because they have any love of 24fps, but because interpolated frames look unnatural. I doubt most people who hate interpolation will have any problem with real 48fps.The reason it's more obvious in video games is the general lack of motion blur. A game looks terrible at 24fps because there's no blur to imply the motion inbetween the frames, but movies have a lot of motion blur, which is what gives that signature film look. A movie at 48fps will probably look like a movie does on a newer 120/240hz TV with whatever they call that fancy frame interpolation.
A film at 48fps will have a very different look to a film at 24fps. I know a lot of people turn off the smoothing feature on new TVs because they prefer the classic 24fps look, because that's what they're used to. It will be interesting to see how the majority feels about this when it comes out.
I hear most people say it's because they prefer the film look, although maybe it's because of the fact interpolation isn't going to look the same as true 48fps. After all, real life is much higher framerate than 48fps, so maybe you're right. Won't know for sure until they try it, I suppose.
