I don't think that this record will be surpassed any time soon. Here is why I say this:

From my personal experience of this fight, my girlfriend at the time was having friends over for it. We had an absolutely packed living room, 15-20 or so people. Compared to ANY other "big" fight, I normally watch it with 3 or 4 friends maximum. There was just a lot of hype and curiosity for this fight and the average person was intrigued for some reason.

Also, this fight was being showed at a local "casino" in the auditorium area on the big screen. Admission was charged and what not. Every bar was showing this fight, also. ANY other fight, even the big ones, are not shown at bars around here. UFC is shown at TWO bars that I know of, but the chance of boxing being showed is VERY slim.

Everyone was talking about this fight.. Everyone was curious who would win, and I don't think that any two, or even ONE fighter has the ability to attract this type of crowd any time soon.