OK, after some digging I found answers for #4 anyways. Looks like there are a number of sets which display 24p at 48, 72 or 96 Hz although the trend is towards 120 Hz going forward.

http://forum.blu-ray.com/showthread.php?t=5155

I guess this adds question #6, which is "how does 120Hz display work with PAL & SECAM broadcasts at 50 Hz timing ?" ;\)


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