how bout a full frame digital M with a sensor that has the equivalent megapixels of slow 35mm film lets say like 30-50 megapixels (I know it's a long shot) that is the same size as an M2/3 not extra thick like the M8 or tall like the M6ttl or M7. have it run on a standard li-ion rechargeble digi-cam battery. incorporate a folding LCD screen like the backdoor of a film M exposer dial on back for instant ISO change, advance lever like the RD-1 to save battery power, plastic coated stainless steel or better yet, titanium horizontal travelling curtian style shutter with a max speed of 1/2000 which is not battery dependant. wide rf base of 70mm, 1:1 finder with lines for 35mm and maybe 28mm (much like the canon P's finder which is big, clear and bright only without 28mm lines, maybe you could squeeze them in if it was .91x). depth of field indicators for rf patch like M3. forget about ttl flash or even a hotshoe. built in diopter correction and high eye releif. make the body out of metal but stick to brass top and bottom plates. offer chrome, black chrome, black paint, anthrasite, grey hammertone with a-la-carte options for whatever covering you desire be it vulcanite, lizzard skin, or sand paper. oh and before i forget make it within the 1500 to 2000 dollar range and have them made in japan or china, whichever makes the camera cost less.
and yeah this probably would only exist in my dreams or maybe is 5-7 years down the road. maybe. maybe not who knows what would you think?