Can most theatres show a film at 48 or 60 fps? I doubt it is just a matter of cranking up the speed on the reel.

Douglas Trumbull the f/x wizard of Space Odyssey, utliized 70mm film and did EEG testing of viewers, he found 60 fps produced the greatest Alpha wave stimulation. For his projection, he used a Philips DP70 ( the Todd-AO projector) with a faster motor speed.
The DP70 had a drive train that could handle the extra mechanical demands, as well as being awarded a technical oscar for the design of the Rolls-Royce of moving picture machines.

He shot the F/x scenes of Brainstorm in Showscan 70 but it was never seen in that format by the public.

That meant 280 feet/min of expensive film passed the apature plate. No room for error otherwise a lot of film could be damaged.

Kiniton has a variable rate machine in their "studio" line of projection equipment.

Originally Todd-AO used 30 fps to reduce the flicker. The present "standard" of 24 fps is at the bottom end of persistance of vision and dates back to Thomas Edison. The third Todd-AO release( South Pacific) was shot at 24 fps to allow optical reduction prints to 35mm anamorphic.

I-MAX is VistaVision on 70mm film at 48 fps.

Check ouy in70mm.com for more reading Or Marty Hart's widescreenmuseum.com...warning may be habit forming!

dp70, thank you for the comments.
great information.

This sounds like it will be phenomenal.
Too bad they can't do it right on TVs.
that 120Hz/240Hz up convert thing makes everyone look like they are moving a double speed to me. It is very creepy and unreal looking.
I can't believe it doesn't have that effect on everyone, but it must be good for most people as they set every TV on the showroom floors to "true motion" or whatever moniker they've put on it.

Hopefully since this format will be shot at the higher speed, it won't suffer from the "spaz motion" effect.

i wonder if anyone asked mr. lucas "sir, as a champion of technology, why are you always so late to the game when it comes to home viewing?" man, he is such a poser.