I'd love to hear from Mssr. Greencat (OP), wouldn't you guys?
PE, I'm glad you mentioned that the Lumiere's were first and foremost, master emulsion makers. Did they have some of the earliest, fastest dry plates? There's a picture of Auguste jumping in mid-air to demonstrate their speed... Umut, you'll recall this, eh?
On the topic of 8mm screen-plate photographs; I am curious what an incredibly coarse grained Autochrome would look like. It certainly wouldn't be realistic color, but the b&w image behind it would be continuous, but with broad, obvious & strange patches of different color.
Maybe I'll take a macro shot of a TV for my next screen!