Real track bikes are not designed with comfort in mind since they are usually not ridden more than a few minutes at a time (excluding hour records, of course). You probably would not want to ride one more than a mile or two on the street (okay, some of you will!)

I heard that real track bike headsets (such as the Dura-Ace Track) have alot of little tiny ball bearings compared to a road h/set for more precise steering but are for smooth velodrome surfaces and are not designed to take the punishment of road conditions, (bumps, potholes etc).