This article by Basang Panaginip, on her blog, showcases some truly amazing pieces of digital art. Titled the World's Most Photorealistic Vector Art, we see examples of peoples skills with tools like Adobe Illustrator - to create far more than simple cell shaded images. These examples from the blog entry show some of the range and quality on display.
[Images from various peoples Vector Graphics work from the Basang blog]
I am yet to take the time to dive into Illustrator, seeing how proponents of the art can wield this piece of softare - I would love to one day.
The images above arent photos, they are vector cg art - look closely . . . cool huh.