There's nothing like being able to hold something in your hand and inspect it. You can look from all angles close or far and can use your sense of touch to aid in understanding completely what you've got.
That's exactly the approach Hawaiian neurosurgeons at the Tripler Army Medical Centre are taking. They're able to plan their surgeries more easily and accurately. Another interesting capability is using the 3D model to explain the upcoming surgery to family members in a more meaningful way.