Mockumentry Genre

The Blair Witch Project, Paranormal Activity, Cloverfield, and so many other horror films have recently been embracing the "reality" craze. Ive seen the Blair Witch Project and I must admit it was just okay. And I say that because at least I did not turn it off half-way through, though I would understand if someone did. The horror part of it is really wondering if anything is ever going to happen. Regardless the genre has been doing fairly well. Could other genre's such as romantic comedy's try a mockumentry approach. Maybe? I think the War genre could do it more, I think even  dramas could. But I think horror will always be the best use of this innovative genre.