I just freaked because I thought that this meant the younger Richard ("Rick") Harrison. I forgot that the "Old Man" shared the name. BTW, let this be a lesson: don't give your son your name or else he might steal it from you and you might end up with an unflattering nickname like "Old Man" so that people can differentiate the two of you.
Anyways, seriously, this is sad. He was always a highlight of the show. I haven't watched it in years, but it's hard for me to imagine it feeling the same with one of the three generations gone.