My ideal camera wouldn't be a camera at all, but a device that could materalize any kind of camera that you needed for that specific situation. Say you ran accross a scene that only a 12x20 would do justice to, them punch in 12x20, and there it is. If you are somewhere with your friends and don't want a lot of equipment bogging you down, punch in 35mm with zoom and boom there it is. Needless to say it would also materalize the approprait lighting equipment and dollies to haul the heavy stuff.
Don't forget to add an instant Sven to move the camera where you want it positioned. You can never have enough Sven's around