Movies shot in 48 (Hobbit), 60 or 120fps will look far better than artificially created motion flow. There is simply no way a $10 chip can do the necessary computations to properly simulate what is really needed, all they can do is apply simple common techniques that work a lot of the time, but no way near all the time.
I won't ever go on record to claim that technology can't do something in the future. There are things being done today with inter frame interpolation for motion flow and pixel level changes for upscaling that were considered impossible just 2 years ago.
Even post production 3D from a 2D camera is creating very realistic stereographic results that is in many cases more accurate than what can be done with twin cameras.
The main issue I have with certain HFR productions, whether done by camera or after the fact with artificial means, is that we have become so used to certain stories being told at traditional 24 fps, motion blur, rack focus techniques, zoom in and out, dolly and crane moves, all part of the story telling technique, that when we attempt to create these stories like real world vision POV, they lose their fantasy effect on the emotion of the story.