Yes, this is great news that your son will not have any pCA gene's passed on from you. However, you might want to have your wife also take a genetic test, just to make sure she isn’t passing on any PCa/breast cancer genes to any of your and her offspring (boys or girls).

Looks like you’ll be treated with standard of care just like the rest of us (mere mortals) who didn’t inherit any prostate cancer-related gene mutations.