that's correct, you no longer need the boat license to sign up for the IKO course or get certified as an IKO instructor.
This is a bit silly as during your course you will have to show that you are able (with the help of others) to rescue a kitesurfer from a boat. This will be done as in this video:
Most schools operate without a rescue boat, but if you ever plan to work in a school that operates in deep water and has a rescue boat they may ask you for a license and you will have to be competent at rescuing kiters from the boat, sometimes all by yourself.
Christian