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... the fact that the photo took about an year to be converted to the the final result is really very significative...
and reminds us that the "ouevre d'art" is not necessarily instantaneous, even in the case of photography but may need a period of maturation...

Yes. Ideas need time to mature. Instant gratification, a malediction of our times often lead to dead ends. Like you say, even a photograph takes time to set and make: it does not end or even begin when the shutter is released.

Great abstract Aref!

Regarding the "what is the limit" question, I basically think there is no limit. However, for reportage photojournalism IMHO there should be a serious attempt to accurately communicate a real event.

Thanks wdj. Yes I do agree with you regarding the limits. Documentary photos should accurately represent reality although it is very hard to do that just because we all have certain ideas which necessarily affect the way we see things and therefore the way we represent things. I had a long running discussion with a journalist friend of mine about objectivity in journalism. My argument is that objectivity--in the true sense--is a myth because of what I stated about our biases. There is nothing wrong with bias as long as it is made clear and not presented as unbiased objective representation of reality.

I'd like to read my daily newspaper like this.

That is certainly one very good way of seeing this piece. That is what I had in mind :)