I wasn't around for Watergate so I can't compare. Were pubs back then blatantly trying to attack the credibility of the hearings altogether? Was the public so rigidly divisive or just unknowing? I think importantly then the hearings were specific. Here it's Cohen testifying to the oversight committee, not part of a voted upon resolution to form a commission to conduct a specific investigation. Back then nearly everyone watched the Watergate hearings. Today? I doubt very much the average public is going to tune in and those who do already having formed a clear opinion on the matter. Importantly, I think there already exists ample evidence publicly known to take action against Trump on more than one separate reason for removal from office. Unless there's a bombshell, I don't see this moving the needle.
But it's not up to me. We'll find out when it happens