Actual surgeons do use simulators for practising. :p They have special controllers instead of the mouse and keyboard to make it close to reality.
Actually due to endoscopic technology a lot of surgery is nowadays computer operated. By using miniature cameras and robotic cutting tools the actual wounds to patients are reduced, which means that an operation that 10 years ago needed weeks to heal can now have a recovery time of a couple of days.
With the increase of miniature robotics and nanotechnology this is expected to become even more important in the future.
Aha, yeah, nanotechnology's allowed a lot of the earlier laparoscopic surgical methods to be further developed and is now used widely in some parts of the world.
I doubt this sim will make its way into the medical handbook, but who knows... some of the operating dummies may soon become a lot more interactive. Right now they don't quite make use of the same kind of simulating software as say, pilots, who rely a lot on the visual aspects.