I was thinking about this the other day. 3D printing continues to become more advanced every few months, even the printing of metal objects. In theory 10-20yrs from now maybe we will be able to print competent camera bodies to house various films? Here is a 3D printed pinhole camera:

http://www.thingiverse.com/thing:9044



Here is another:



There is also the talk of 3D printed circuitry becoming a reality using graphene..