That Sir, is a big Image. A somewhat giant leap up from 96"
There are well known ways to produce photo images of content and be able to have them be exacting enough to judge performance by. Basically, much if not all lies in the hand of the "Taker", and through technique and observation, images that can be honestly said to represent what "The Eye" sees at entire;y possible.
All the more so in these days of high contrast, high resolution projectors.
But those very improvements of contrast and brightness can make taking accurate photos harder....like shooting portraits outside in full sunlight.
The final say? The photographer's own veracity is at stake...he's either accepted as knowing the how to-why-when of taking dark room & ambient light imagery, or anything can...and usually will be called into question.
..........unless you own a CRT and post 'em on "that" Screen Shot War thread.
For some odd reason, no one ever questions anybody on there???? Could it be that image quality and reduced light output, and the fact that virtually all such screenies are taken in total darkness, possible have more...no, a LOT
to do with a camera's ability to meter out and grab a balanced light input through the Len's and onto the CCD sensors? Surely not!!!
Just guessing, I'd say that screen was at least 135" diagonal in 2.35:1 mode.
The images you took, considering the IPhone's camera and the screen's size, look pretty good for impromptu. Let me know if you can procure a decent Digital and I'll be glad to give you some pointers.
BTW, the Ceiling being a Darker shade of the Wall color......brilliant idea! Where did you pick up on that?
Works just as good as "Black", but looks much better when the lights are "up".