As for 24fps vs 48fps, it's a fairly different situation. For one, it's not about image quality. And there are legit arguments that it detracts from 'cinematic quality' of video, especially movies. My opinion is split on it. I greatly appreciate the lack of jerkiness with panning shots and whatnot, but I also feel the 'soap opera effect' does rear its ugly head and makes certain things look a lot more fake.
Part of the problem is expectation of the viewer after decades of 24 fps. The other part of the solution is that the set designers, make-up and cgi guys simply have to do a better job (as in a higher minimum standard). I know they've got it quite tough already but it should be do-able in the big budget films that choose 48 fps.