On the question of what will happen to you.
I am sure the police deal with "minor" road rage type problems every day of the week.
He damaged your car a little, you kicked his car (but maybe did little damage) and neither of you actually "hit" each other so I doubt the police will want to bother to follow this up with any arrrests or a court case.
Both of you may get a verbal warning from the police.
It is probably not worht either of your claiming on your insurance as you may lose more with your no claims bonus than youi gain in any cost to repair the car.
Next time count to ten before shouting at someone in this situation.
I am afraid in this day and age some people turn very nasty and there has been cases of extreme violence after "road rage" incidents
http://www.telegraph....th-driver-jailed.html