[noggin]

@noggin I can't pm you but have a side question- can 120hz tvs actually play 23.976fps correctly? Do they adjust to 119.88hz (x5)?

That's my understanding. As far as I know 24.000 vs 23.976Hz are so close that they lock to either vertical sync with no problems.

Given that all "60Hz" broadcast TV in North America is 59.94Hz, then they are probably running at 119.88Hz pretty much all the time. The only time they would need to run at 120Hz is on the rare occasion a (mainly European) 24.000Hz Blu-ray is being played?

(23.976Hz is entirely a function of the US TV industry. NTSC used to be 60Hz when it was black and white, but when colour was introduced, they were worried that the colour subcarrier would interfere with the FM carrier used to carry the audio. As the colour subcarrier is locked to the line rate, they needed to alter the line rate to avoid this. The number of lines were fixed at 525 (total) so they had to alter the field/frame rate to alter the line rate - and so ended up at 59.94Hz. This meant that "24fps" film shot for TV purposes was shot at 23.976Hz to deliver 59.94Hz after 3:2 pulldown. The 59.94 field/frame rate remained for HDTV - to allow for up- and down-conversion to 59.94Hz SD. The original Japanese standard was 60.000Hz and the up and down-converters had to drop frames - usually on cuts if possible - to get to 59.94Hz for SD)