When I first got my flat screen, 120 hz, interpolation and all - the very first thing I noticed and that was jarring was that everything blu-ray and/or HD looked like a soap opera because of the higher frame rate. It bugged me quite a bit…for about 2 weeks. Then I got used to it, and I can’t even re-create that reaction anymore.
The brain adjusts. It makes sense to go to higher frame rates (film’s 24 FPS is an ancient artifact, and fast motion on film has all sorts of of blurring and distortion.) My own prediction is that people will bitch about it for a month or two, but once a few films have been released this way nobody will even notice anymore.