The question to ask is when he's our age, circa 2075, will photography exist in any form at all? There won't be time travel by then because he would have already come back to tell you your pictures are "interesting."
Bill Phillips: There will be some form of photography as the single image is still, potentially, the most powerful record of an event. Cameras will probably have resolutions in Gigapixels and be able to take close up pictures of Mars from the Streets of Bath. The camera will be part of a device no bigger than a chocolate button which will also be a complete communication system, games console and coffee percolator. You don't want to know where the printer will be