I have to agree with Matt. If you ever did work with a 3d rendering software then you know what we are talking about: Artists often work with quite simple textures but the bumpmaps, the lighting, specular effects and other options make it photorealistic. The same way will be the future for 3d games. We already have that. Riddick / Chronicles did show very perfect how cool a shader game can be. The characters where so real with correctly illuminated muscles and so on. You will never achieve that with textures only. Faked lighting on your character that is baked into a texture will not be needed in the future.