How many people really notice the difference between 3K and 6K?
"The best zoom lens is your legs." - Ernst Haas
Quite right. Just because you CAN go to f1.8 doesn't mean you should. I have the Canon EOS-M so some similarities to the 5D. If I switch to photo and half depress the shutter button. That shows me the ISO number so I can close down the aperture until it is almost to ISO 200.
If an audience is wondering about the resolution of the film, it can't be that interesting a film.
If you have one long continuous shot then it doesn't apply. I'm not sure whether the opening scene of Orson Welles' "A Touch Of Evil" breaks the rule but it could have done. Opening credits to "Roseanne" clearly does.
How apt is Number 6. Watching Patrick McGoohan in "The Prisoner" last night, his character Number 6 escapes the Village (for a while) in "Many Happy Returns". He gets back to London and meets people who he knows very well, yet because of the premise of the show, they are unable to use his name.
See also Adrian Edmondson as "I'm Billy Balfour, the Man with No Name" in "A Fistful of Travellers' Cheques"