There is one concept to reality sites that I don't think will ever lose it's appeal, that being exclusive content. It doesn't matter how you wrap the content up in the tour, as long as you can't find it anywhere else, it is going to do well. Also, I think the fact that reality type sites have a central theme and characters like tv shows and such, will help them stay popular.
So I'm on the side of they are here to stay.
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