Does anyone else wonder if the concept of "internet famousness" has a finite shelf life? At least at the level that these people experienced?

The internet engine seems to be cranking through memes faster and faster. Sure, a video might get several million views, but the very next week, those millions of people are already on to the next thing.

It just seems to me like our collective memory is getting shorter and shorter and the fallout from internet famousness might start shrinking, if it hasn't already.