IT Fairs serve little purpose for the camera-buying consumer most of the time. It is just a good time for merchants to get rid of stocks since people who go are looking to buy. That said, on rare occasions, you might get a decent package deal - though not everything in the package is always useful.
As to whether the price will drop, trust me, IT Fairs do not do anything to that. You might want to look at more substantial camera-world events such as release of new models, etc.