If it was a real photograph, I do not think you would see any stars in the frame. The Earth is extremely bright compared to the stars. If the exposure of the film/video (or your eyes) was set to portray the Earth at that brightness, you wouldn't see any stars.
I like the accurate size/distance but it doesn't have to be a photorealistic representation for me. Pure black except for the earth/moon is boring for a desktop background, and stars are pretty ;o)
Example: http://www.astrobio.net/images/galleryimages_images/Gallery_... This is a real image and is not CG.
Another one: http://eol.jsc.nasa.gov/sseop/images/ISD/highres/AS17/AS17-1...