I have a friend that does some 3D animation using lightWave. Mostly for TV News Promos and TV and Radio commercials. He showed me an option when rendering animation that makes it look more real, Motion Blur. It simulates the look that you get when you shoot a real object moving in film and video. In film and video you are not capturing a perfect slice of time, you are capturing all the motion that happened while the shutter was open. We even see this a lot with our own vision. We see blurred motion so often that when we don't see it our brains know something is wrong.
Some good links:
http://www.revisionfx.com/mblur/lenblur.mov
http://digilander.libero.it/F1Land/3...otionblur.html
http://www.cc.gatech.edu/cpl/projects/blur/
http://www.revisionfx.com/mblur/dinoBlur.mov
