It definitely is impressived but I think the "tell" is the barrel diameter trasition - wher eit sslopes fom narrow to wide. Its a bit too smooth and the shadow too uniform. Like most computer models its "too perfect" and that's what gives it away. In general computer effects/rendering fall into these categories. Its too clear, moves too smooth, too detailed. It's not something that you pick up on right away but your subconscious minds says - there's something wrong with that ... I'm just not sure what...
None the less it 's still a technological marvel - and I love the progress we all are making!
Jedi Dade