My experience of The Hobbit was that the 24fps version felt like being in Middle Earth, and the 48fps felt like being on the film set - which strictly speaking was the more realistic experience, but far less satisfying.
People have been watching movies at 24fps for so long that they've been trained to put their brains into movie mode and suspend their disbelief when they see something at that rate.
There were similar outcries at the advents of colour movies and "talkies". Once people have watched a few HFR movies, I'm sure they'll get used to it and learn how to suspend their disbelief again.
Maybe, maybe not - it may also depend on the movie being made. I thought the Hobbit was kinda tacky compared to LotR, it seemed to have a much smaller budget, especially in the CGI and extras/makeup department.
But, I'll give it the benefit of the doubt for now - 3D was kinda crappy too at first, but some years later the movie makers have improved the technique to make it far less annoying. It's become more than just a gimmick now.
To me it felt like a video game, and in fact the action supported this. I was left wondering why someone would go to the trouble of making a computer game that you cannot play.
I always find sports footage strange to watch on TV. I have a feeling its because of a higher frame rate, and less blurring of movement. Its kind of crisper but less absorbing.
