117 Future genres (cat selfies?)

What defines a genre? How does a genre come into favour and then fall out again? We can all name some traditional genres - landscape, reportage, street, portrait... but what about new genres like fishface selfies and cat pics. Do genres breed technology or does technology breed genres? All this and more in TFOP this week! Picks of the week: 3StreetGallery, Future cameras, Portraying pregnancy.