Why not forget it? I don't know how badly hurt the guy was or what shape his bike was in, but if both were pretty much OK (give or take the odd ding), why take it any further? Do you want revenge? Do you want to deal with the police, lawyers and insurance companies? Life's too short to fester away with all that crap. Forget it.
I couldn't forget it if that happened to me. I would want to do my best to ensure the driver did not do the same thing again to another cyclist. If there are no consequences for their actions, then what is there to prevent them from doing the same thing again?
According to the report the guy was left with "severe bruising". He got lucky, it could have been a lot worse. I wonder if he had suffered more severe injuries (e.g. preventing him from being able to work and earn a living), whether he would have been quite so forgiving about it?