guys, keep in mind that this is a camera, not a EBook Reader, neither Game Console...
about the games, i dont see why would anyone put efforts in games instead of more extras in hack. not to mention how heavy it would be ...
about the pdf, you can forget about it, it would be almost impossible to integrate pdf parser and then render it in the camera display... besides that it would look like an picture after all... so why wont you just make it a JPG and put it on the camera ?