Filter threads would have died out 20 years ago (even though the only filters that most digital cameras need are UV/clear and polarizing). There would be no under-performing lenses and all would have neutral or pleasant bokeh. DSLRs would not have an LCD on the top panel. The professional DSLRs would have fewer features (e.g. no 'art' filters etc.). They would allow third-party software 'applets' for such things but they'd never be allowed to move, delete or modify captured images nor would they be allowed to interfere with the camera's controls. Pro bodies would have always had dual SD card slots. Lenses would allow manual focus and zoom but would not have aperture rings (as is the case now) Materials used for construction would be chosen on the basis of best suitability. Plastic would not be shunned by default but not used for the sake of cost-cutting; transparent ceramics might be used as well. No more 3:2 aspect ratio. All sensors would be 4:3 with optional 16:9 mode. I'm not saying all of those are good or necessary (excepting the first two). But they seem to me like ideas that Jobs would promote.