We are in an interesting time today where things don't "stick" like they used to. I'm really old (

) and when I was young people still talked about a movie like the Godfather years after it was released. People still loved the Doors and the Beatles even though they had broken up years earlier. Shows like Star Trek and the Brady Bunch were popular years after they were canceled.
Today, a movie like the Matrix will be a really big deal for a few months, and then it is very quickly forgotten. A show like "Lost" has thousands of obsessed rabid fans one year, and suddenly the next year it has no following at all. The same goes for scandal. One minute Kim Kardashian is known for being in a sex tape, and before you know it, she's known for having a TV show and the tape is all but forgotten. So it's not surprising that someone like Royce Gracie can be forgotten so quickly. That's pretty much the way things go today.
The upside is that for every Matrix or Royce that is "forgotten" some new movie or person pops up that captivates the public for a while. There is more innovation today than there was in the old days. So the lack of stickiness for things today is neither good nor bad in my view. It's a trade off.