For the number of people I know who accidentally have "MotionFlow" or similar technology enabled on their TVs and say, "this TV makes my movies look terrible! They look like they were shot on a camcorder!" without knowing why, I'd say 24p makes more of a psychological difference to a viewer than this article postulates... And that 24p will be around for a good while.
Although, whether we are merely "programmed" by experience to see 24p as being a richer and more subjective viewing experience, or whether there is inherently something in holding back those 6 frames per second that makes the human mind more apt to suspend its disbelief at the alternate reality it sees played out before it, is a valid question.
I guess it would be interesting to see what someone growing up in the UK, being used to seeing everything in 25fps, thinks of video shot in 30p...
I have lived in the UK most of my life and watch most video on 25fps, whether speeded up 24fps or interlaced 50fields-ps.
For the past 25 years I have regularly travelled to the USA - typical 3 or 4, but often up to 8, times a year usually on business but occasionally on vacation too. For most of that time I thought the picture quality of the US TV 30/60Hz system was a joke and was surprised you people put up with it. It is only in the last couple of years, with the proliferation of HDTV on hotel TVs that I feel you have actually achieved an acceptable level of image quality on your TV. Production and content is another matter, but that is US culture: "it would be a good idea".
I also remember the complaints when, in the late 1980s, the TV series "Dallas" switched from being shot on film to video. It became 30fps 60i video converted to 25fps 50i PAL whilst previous series had been 24fps film speeded up to 25fps 50i PAL. The BBC, who screened the show in the UK, telephone exchange was blocked with viewers complaining about the image quality. Now, you can argue that this was a consequence of the conversion quality, but the simple fact is that this showed the limitations of 30fps video to the masses and it wasn't acceptable to the millions that had experienced better.