If you guys want to blast to the past, then blast then the look of modern photography was set by Art Kane.http://Artkane.com/
Some of this holds up today, some doesn't but Kane didn't do the "let technique rule the concept", which we see as much if not more today than he did when he started.
He went to 35mm when in the professional world that was heresy. Then again he shot fashion with a 20mm, martini glasses in the sahara when nobody dared shoot a product shot outside in the sun, Louis Armstrong on a railroad track, when even today, that shot would have been on a white background at the standard boring NY studio on a white cove.
They knew Kodachrome wasn't 8x10, but then again, they knew that dropping an 8x10 down low, adding a wide, checking the corners for cutoff, focus, compose, focus compose would cut into the spontaneity.
I've shot people with 8x10 but only because I wanted to but only one client ever demand it (and this is right before we went to digital capture), so I dunno it depends on what you shoot., how you shoot, what style you shoot in.
But digital has changed the format definition. Large format is 645, medium format is 35mm, small 35mm format is micro four thirds and the micro four thirds cameras like the om1 reflect that.
I own all three formats, actually with the RED cinema cameras 4 formats and see a use for all, but don't believe that there are any rules when it comes to formats.
This is a still from the RED1, why . . . cause I like it.
This was a video with a p21+ a Contax and flash , because . . . I wanted that cut frame look.http://www.russellrutherford.com/cut_frank_lola.mov
This image I shot with a 5d2 because I left the 1ds3's and contax in LA, was in Paris shooting motion and had an editorial come in.
This made a 5'x9" print sold in auction for 5 figures and I'm not a fine art guy.
I have one of these prints in my Hallway. Last night I looked at it and I can promise you, the technical quality (whatever that means) isn't any better if as good as the omd em1.
I'm positive of that, but the photo worked, the editorial ran and the cherry on top was the fine art sale.
Now if Sony made the A7 series (which is a shameless rip off of the omd em-1 design) as good a camera as the em1(it's not) or shot as pretty (it' doesn't other than megapixel detail with a sandbag on top), then I'll buy it, but if anyone makes a a larger format small camera I hope it's olympus cause those cats can make a camera and they don't seem to give a rats a__ about who has the largest in the room.